Please Give Me Tips On What to Do To My Car - Hot Rod Forum : Hotrodders Bulletin Board
Hotrodders.com -- Hot Rod Forum



Register FAQ Search Today's Posts Unanswered Posts Auto Escrow Insurance Auto Loans
Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Hotrodding Basics
User Name
Password
lost password?   |   register now

Reply
 
LinkBack Thread Tools
  #1 (permalink)  
Old 02-18-2004, 08:16 PM
Malibu Nut
 
Join Date: Feb 2004
Location: Tennessee
Age: 26
Posts: 84
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Please Give Me Tips On What to Do To My Car

Hi, I am 16 and I have a 1978 Malibu with a 305 (approx 240 hp. & 82000 original miles) , all I have done to it is put on it an Eldelbrock intake and carb. I have been wanting to change out the 200 Metric tranny for a while for 350 Turbo. My parents don't want me to change out the 305, so what do you think I should do. I would like to get 350 to 400 horsepower out of it. My dad and I was thinking about rebuilding it and putting a Comp cam in it, bore it, change the heads, change 2.65? rear end out to a 3.73. I was really wondering what parts I should use from the cam to the heads and everything in between. This is on a really tight budget. PLEASE HELP!!!!

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 02-18-2004, 08:28 PM
Member
 
Join Date: Oct 2003
Location: Arkansas
Posts: 413
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
If you want a serious 400 HP, you REALLY need to convince your parents to let you get a 350, especially if your taking the motor out. Otherwise, to keep it streetable you may have to use a small shot of nitrous. Also, the 200 metric must go.
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 02-18-2004, 08:33 PM
Erk Erk is offline
Member
 
Join Date: Feb 2004
Location: Vincennes,IN
Age: 26
Posts: 112
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
350 with a small cleanup, stock bottom end, 10:1 compression with hypereutectic pistons, generic rpm intake, 650holley double pumper.Vortec heads with maybe bigger springs, run a solid lift cam with around .500 lift, paired with a decent set of headers(dynomax, or flowtech they make for gbody, so does schoenfield(sp?) but they are sort of pricey. and Supercomps won't benifit really). All of this should put you close to the 400hp mark.

-Eric
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 02-18-2004, 08:34 PM
DoubleVision's Avatar
Not Considered a Senior Member
 
Last photo:
Join Date: Oct 2002
Location: Heart Of Dixie
Age: 40
Posts: 10,654
Wiki Edits: 0

Thanks: 15
Thanked 58 Times in 55 Posts
I hope you got lots of money, 400 horses out of a 305 is asking a bit much. your 305 from the factory put out 155 horses, it didn`t quite pick up 80 horses from just a intake swap. get a 350, add a mild cam and other mild mods to it, start out mildly, since your just 16 and somewhat new to driving, learn to drive one with more power than stock, it`s wise to do so, since you can`t enjoy your ride without a license, a life or in a wheel chair.
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 02-18-2004, 08:42 PM
Jared's Avatar
Member
 
Last photo:
Join Date: Feb 2003
Location: Fargo, ND
Age: 29
Posts: 478
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
with the money it would take to get 350-400 horse out of the 305, if you could do it to your engine, you could build one heck of a nice 350. I have at least 3000 in my 350 and am only sitting at 350 or so hp. I did a lot of unnecessary modifications for strength but still, more cubes more hp potential (with some exceptions). get an early 70's 350 and start there you should have decent heads then and a good block to work with. look for a truck with a 350 and you might snag a 4 bolt main and a forged crank. the bigger the truck the better, long as it has a 350. there cheaper to build than 305's too. if you did the 350 go with the lower gears like 3.0- 3.73 if you go 3.73 you might want a 88 or newer th700r4 for the overdrive. with that gearing you go thru some gas on the highway. I like comp cams i have a comp 268 extreme energy and matching springs and i like it. i am going to go full roller later to match my manual, but for my auto i liked the 268. I am running world products S/R torquer heads with manley race flo valves( got the bare castings cheap and built them for less than they cost assembled) but just stock 64 cc chamber heads will get you where you want to go. Go with a dual plane intake I like weiand. i have a stealth, nice intake. What size carb do you have? you might need a bigger one if its a 600 or less and you want 350+ ponies. shoot for around 9.5:1 compression for cast iron heads closer to 10.5 for aluminum. look around for good casting heads if you want the net is full of the good casting numbers if you can find Camel backs you should be able to build a good flowing engine. Personally im a holley- demon guy so dont ask me about edelbrocks im lost with them. Im running a 650 demon and its almost too much carb but they flow more like a 750. somewhere in the 625-750 range and you should be able to feed your ponies. In summit they have some nice rebuild kits and they dont cost too much might want to look at summitracing.com just my .02 good luck I started building at about your age now im 18 and have build about 4 engines 3 chevys and a ford 429. once you do one almost all of them make since. have fun. p.s. some machine shops have blocks and heads for sale might be a place to start or salvage yards, around here a 350 4 bolt main short block is 150.00 as is.
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 02-18-2004, 10:25 PM
Member
 
Last photo:
Join Date: May 2003
Location: Shreveport LA
Age: 64
Posts: 5,103
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Hey, at least they'll let you have a V8 car. Mine wouldn't. Had to be a 6. (Never said anyting about how big or how hopped up though.) For now, I'd start with dual exhaust & a higher-ratio rear-end gear & posi. Also, a new timing chain (it cured my 70,000 mi. '78 305 of a bad off-idle stumble, plus it's a half-arsed excuse to put in a mild cam). The T-350 trans sound good for longevity, too. If your dad's a car guy, he'll probably OK a bigger motor once you convince him you won't kill yourself with it.
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 02-18-2004, 10:39 PM
sbchevfreak's Avatar
Licenced Automotive Technician
 
Last photo:
Join Date: Feb 2004
Location: Land of big Easter eggs, Alberta
Age: 34
Posts: 1,604
Wiki Edits: 0

Thanks: 8
Thanked 9 Times in 9 Posts
so no 350 from the parental type people, eh? that sucks, man, but it ain't the end of the world!! cant' swap the 305, but no one said you can't change your stock displacement. i helped a friend out with a similar problem a few years back. ended up boring .030 over, true flattops, 350hp 327 cam(gm p/n 3863151)and stabbed in a 350 crank, and with a little friendly machine work, voila! one 327 stroker! spent some time porting the small chambered 305 heads, and it turned out pretty wild for a really low budget. never had it dyno'd, but estimated at a strong 350hp. but estimates are usually out a bit. you pick which way!
Reply With Quote Quick reply to this message
  #8 (permalink)  
Old 02-18-2004, 11:19 PM
Member
 
Last photo:
Join Date: Nov 2002
Posts: 493
Wiki Edits: 0

Thanks: 0
Thanked 1 Time in 1 Post
Should give you a few ideas on how to build your 305. Dan

http://members.optushome.com.au/iroc...5/325hp305.htm

http://www.goingfaster.com/spo/290hp305.html

http://www.goingfaster.com/spo/343hp305.html

http://www.hioutput.com/tech/400hp/400hp.html

===================================


One other thing that should be pointed out. The 350 and 305 both have the same 3.48" stroke. Putting a 350 crank in, does nothing to increase displacement or performance.


I run a 305 with 3.73 gears and a 200-4R. Without an overdrive, the 3.73 gear would be a bit much for me. I must also point out the fact that the car will be slower with a TH350 than with the TH200 you already have. The 200 has a lower first gear ratio, is lighter, and has less rotating mass. The strength of the 200 shouldn't be an issue with the 305. Shift kits are available to firm the soft 1-2 shift up.
Reply With Quote Quick reply to this message
  #9 (permalink)  
Old 02-18-2004, 11:50 PM
killerformula's Avatar
Hotrodders.com Moderator
 
Last wiki edit: Carburetor
Last journal entry: Clean up
Last photo:
Join Date: Oct 2003
Location: Northeast
Age: 34
Posts: 3,485
Wiki Edits: 3

Thanks: 13
Thanked 27 Times in 18 Posts
Near impossible... and I doubt its putting out 240 now. Probalby closer to 200 if you're lucky.

K
Reply With Quote Quick reply to this message
  #10 (permalink)  
Old 02-18-2004, 11:53 PM
Grumpy
 
Last photo:
Join Date: Dec 2002
Location: D.C.
Posts: 1,447
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Yeah, running a 3.73 with a TH350 or TH200 is not possible, you will need a 200-4R for that. And for a 78 it should be a TH350 not a TH200.

If it is in fact a TH200, get a 3.08, or 3.23 rear and use 27" tires(ie. 235/65/15s) to gain back mileage. For a 305 a TH200 should be more than enough and I seriously dought a stock 305 is putting out 240HP, more around 180-200.

In the long run it would just be easier to get a 200-4R and run 3.73s, you will not only pick up acceleration time, but you will be able to drive on the beltway with-out killing the car.

Just looked up the 305 for 78:
H- 160HP@4000 x 265ft lbs@2200 8.5:1
U- 145HP@3500 x 245ft lbs@2400 8.5:1

as with all chevy engines these 305s suffer from tinny intake/exhaust runners from the manifold down.

Last edited by 87442lover; 02-19-2004 at 12:01 AM.
Reply With Quote Quick reply to this message
  #11 (permalink)  
Old 02-19-2004, 08:09 AM
Malibu Nut
 
Join Date: Feb 2004
Location: Tennessee
Age: 26
Posts: 84
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
I really wasn't sure how much horsepower it had that was just what a mechanic told me. The mechanic has a 350 that runs but it smokes a little for $200-300. And he also has alot of other 350s & 400s for around $100-200 for a block. Now that you have given me this info. I am really thinking about changing out the engine to something bigger. My dad would let me put a 350 or 400 in it but my mom wouldn't like
it. She says it runs fine and it does. If you nail it, it will roast them and chirp second. But I would really like to
run high 7s low 8s in and 1/8th so please give me more help on were to get parts and what to get.
Reply With Quote Quick reply to this message
  #12 (permalink)  
Old 02-19-2004, 08:20 AM
brainsboy's Avatar
brains
 
Last photo:
Join Date: Jan 2004
Location: tampa
Age: 42
Posts: 988
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
When I was 17 my dad wouldn't let me change out my 318ci in my dodge challenger. So I bought a 340 block, and spent 1 year taking my time to build up a 340ci. By the time my motor was done, I made the change, he didnt say much about it, of course its hard to remember that long ago.. My god im getting old...

One way you might get them to let you build the 350 is that you can continue to use your car with the old 305 motor until your done building your 350. If you pull the 305 motor you will have the down time.
Reply With Quote Quick reply to this message
  #13 (permalink)  
Old 02-19-2004, 08:27 AM
Member
 
Join Date: Oct 2003
Location: Arkansas
Posts: 413
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
And he also has alot of other 350s & 400s for around $100-200 for a block.
If you can get a 400, by all means get it if you wanna run high 7's in 1/8th.

oh yeah, get me one too!
Reply With Quote Quick reply to this message
  #14 (permalink)  
Old 02-19-2004, 09:34 AM
Malibu Nut
 
Join Date: Feb 2004
Location: Tennessee
Age: 26
Posts: 84
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
What do y'all think I should get a 350 or 400? What would be cheaper to build or would they be about the same?

I have also been told that a 2 bolt 400 block is thicker than a 400. And I could cut out the main bearings and make it a 4 bolt by changing the main caps or bearings something like. I really want a high performance engine that gets good
gas milege. Also what kind of tranny should I get and should
change the rear end to a different 10 bolt, go to a 12 bolt, or just keep the 7.5 rear end.

What kind of heads should I get? My dads friend told me he'll give me a of double hump 300 hp heads would these do on a build 350 or 400 with a 3 angle valve job and being completely rebuild.

The only mods that I have made is a 600 CFM Edelbrock Carb and High Rise Intake and a Dual Exhaust. And just recently had everything tuned and had the carb rebuilt and also the distributor. Please send me some info I really need some opinions on this to make it run perfect.

Last edited by MyMalibu; 02-19-2004 at 09:34 AM.
Reply With Quote Quick reply to this message
  #15 (permalink)  
Old 02-19-2004, 09:54 AM
Member
 
Last photo:
Join Date: Feb 2004
Location: Louisiana
Posts: 205
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally posted by 87442lover
Yeah, running a 3.73 with a TH350 or TH200 is not possible, you will need a 200-4R for that. And for a 78 it should be a TH350 not a TH200.

If it is in fact a TH200, get a 3.08, or 3.23 rear and use 27" tires(ie. 235/65/15s) to gain back mileage. For a 305 a TH200 should be more than enough and I seriously dought a stock 305 is putting out 240HP, more around 180-200.

In the long run it would just be easier to get a 200-4R and run 3.73s, you will not only pick up acceleration time, but you will be able to drive on the beltway with-out killing the car.

Just looked up the 305 for 78:
H- 160HP@4000 x 265ft lbs@2200 8.5:1
U- 145HP@3500 x 245ft lbs@2400 8.5:1

as with all chevy engines these 305s suffer from tinny intake/exhaust runners from the manifold down.
I'm new, just want info. They all suffer compared to what?
Reply With Quote Quick reply to this message

Recent Hotrodding Basics posts with photos

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Hot Rod Forum : Hotrodders Bulletin Board forums, you must first register.
Please enter your desired user name (usually not your first and last name), your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -6. The time now is 08:14 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
Copyright Hotrodders.com 1999 - 2012. All Rights Reserved.