350 chevy - 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 03-19-2009, 11:14 PM
Registered User
 
Last photo:
Join Date: Jan 2009
Location: P.E.I
Posts: 46
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
350 chevy

hey i was wondering if someone could maybe dyno my engine and give me a ballpark figure. also, how much more hp would i get with the same combo if i bored it to 355? any guesses on 1/4 time? thanks

350 BLOCK, 2 BOLT MAINS
BLOCK CASTING NUMBER 3970010
eagle CRANK,
(OLIVER) 6" CONNECTING RODS - FORGED STEEL WITH (ARP) BOLTS
(WISECO)? PISTONS 6166A4 FORGED ALUMINUM FLAT TOPS - 2 VALVE NOTCHES - .927 PIN - SIDE HEIGHT 2.07" compression is 9.8-1
(MELLINGS) M55HV HIGH VOLUME OIL PUMP
BALANCER 3896966
CAMSHAFT- comps cam extreme energy(hyd. roller) .502/.510lift, 106 centerlines (not sure on duration i think its .234?)
DOUBLE ROLLER TIMING CHAIN & SPROCKET 3100 SRS
edelbrock performer rpm al. heads 2.02 intake 1.60exhst
edelbrock performer rpm air gap high rise intake, dual plane
holley 750 carb.
2800 stall.
1.5'' headers
the tranny is a 700r4 with stage 2 shift kit, rear end is ford 9'' with mini spool and 355 gears. its all in a 1987 gmc s-15, any guesses on 1/4 time? 15x10 slick, coil overs on the rear with ladder bars. weight is around 3300
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 03-20-2009, 12:55 AM
techinspector1's Avatar
Senior Curmudgeon
 
Last wiki edit: DynoSim combinations Last photo:
Join Date: Oct 2005
Location: Hemet, California, USA
Age: 72
Posts: 12,246
Wiki Edits: 326

Thanks: 602
Thanked 767 Times in 657 Posts
HYDRAULIC ROLLER-High performance street machines, 2000+ stall, gears, choppy idle. 1900 to 5600, 12-423-8, XR276HR, 276/282, 224/230, .502/.510, 110

RPM HP TQ
2000 123 322
2500 159 334
3000 216 378
3500 272 408
4000 322 422
4500 367 428
5000 400 420
5500 421 402
6000 425 372
6500 400 323
The 1.5 headers are killin' you. Use 1 3/4" primaries, equal-length, long-tube headers through 2 1/2" pipes with an X-pipe and the mufflers of your choice. I'd also back down one notch on the cam and use 1.6 rockers on intake and exhaust.

1 3/4" headers, HYDRAULIC ROLLER-High performance application, largest cam with stock converter, noticeable idle. 1600 to 5400, 12-422-8, XR270HR, 270/276 218/224, .528"/.535" w/1.6 rockers, 106/114/110. Timing events @ 0.050" tappet lift, 3/35/46/-2.

RPM HP TQ
2000 144 379
2500 184 387
3000 237 415
3500 300 449
4000 358 470
4500 410 478
5000 449 471
5500 468 446
6000 471 412
6500 447 361
This cam produces 400+ ft/lbs of torque from 2700 to 6200. Use your 2800 stall converter and keep the tire companies in business. Horsepower flattens out at 5500 and noses over at 6100. (Your hydraulic roller lifters will begin pumping up at 6200, floating the valves). Volumetric efficiency reaches a peak of 99.1% at 5000 rpm's. BMEP pressure reaches a peak of 202.9 at 4500. This is a good, solid street/strip motor in my opinion.

Last edited by techinspector1; 03-20-2009 at 01:05 AM.
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 03-20-2009, 03:27 PM
Registered User
 
Last photo:
Join Date: Jan 2009
Location: P.E.I
Posts: 46
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
thanks it will be mostly for the street, but i was hoping sumwehres around 420 hp, can you run a dyno of just the 1 3/4" headers with the 1.5 rockers? why should i switch to the 1.6?
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 03-20-2009, 04:43 PM
techinspector1's Avatar
Senior Curmudgeon
 
Last wiki edit: DynoSim combinations Last photo:
Join Date: Oct 2005
Location: Hemet, California, USA
Age: 72
Posts: 12,246
Wiki Edits: 326

Thanks: 602
Thanked 767 Times in 657 Posts
"why should i switch to the 1.6?"

More torque and horsepower with the same cam. I probably wouldn't do it with a flat tappet cam because of the additional strain at the lifter/lobe interface, but with a roller cam they'll work fine. I also wouldn't invest in 1.6 rockers if I already had 1.5 rockers on hand. But if I hadn't bought rockers yet, I would go for the 1.6's with a roller cam. Every little bit helps.....

Same as above, but with 1.5 rockers.....

RPM HP TQ
2000 144 378
2500 183 385
3000 236 414
3500 298 447
4000 356 467
4500 407 475
5000 444 467
5500 464 443
6000 465 407
6500 439 355
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 03-20-2009, 05:19 PM
Registered User
 
Last photo:
Join Date: Jan 2009
Location: P.E.I
Posts: 46
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
will the 1.6's really make a big difference? i have a set of the scorpion rollers, so they are a pretty good set of rockers, also, i was wondering if a carb spacer will help any, i dont think it will cause i already have a high rise intake, any guesses on 1/4 mile time? thanks
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 03-20-2009, 05:59 PM
techinspector1's Avatar
Senior Curmudgeon
 
Last wiki edit: DynoSim combinations Last photo:
Join Date: Oct 2005
Location: Hemet, California, USA
Age: 72
Posts: 12,246
Wiki Edits: 326

Thanks: 602
Thanked 767 Times in 657 Posts
Carb spacers are a "try it and see what happens" kind of part. You never know until you bolt it on and go.

If you have 1.5 rockers on hand, use 'em.
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 03-21-2009, 08:55 AM
Registered User
 
Last photo:
Join Date: Jan 2009
Location: P.E.I
Posts: 46
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
does anyone know what this might run in the quarter?
Reply With Quote Quick reply to this message
  #8 (permalink)  
Old 03-23-2009, 01:22 PM
V8 Super Beetle's Avatar
VW makes it, Chevy shakes it..
 
Last photo:
Join Date: Jan 2008
Location: Houston, TX
Age: 33
Posts: 1,245
Wiki Edits: 0

Thanks: 5
Thanked 0 Times in 0 Posts
425 hp dyno. Vehicle weight @ 3300 lbs = 12.15

471 hp dyno. Vehicle weight @ 3300 lbs = 11.74

465 hp dyno. Vehicle weight @ 3300 lbs = 11.79


Calculate 1/4 Mile ET From Horsepower.

http://robrobinette.com/et.htm
Reply With Quote Quick reply to this message
  #9 (permalink)  
Old 04-11-2009, 04:43 PM
Registered User
 
Last photo:
Join Date: Jan 2009
Location: P.E.I
Posts: 46
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
hey techinspector1, can you run a virtual dyno, with a compression ratio of 10.6:1, running1 5/8 headers. everythign else is the same, thanks
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


Similar Threads
Thread Thread Starter Forum Replies Last Post
finally finished chevy 350 build redneckrodder Engine 7 05-30-2011 06:03 PM
350 chevy heads question pena0724 Engine 7 03-02-2009 06:09 AM
350 chevy pena0724 Engine 2 02-17-2009 08:04 PM
350 Chevy in a '73 TransAm Lawngodfather Engine 7 06-10-2008 08:08 AM
El Camino Engine - 350 Chevy or 455 Pontiac bjam2 Engine 16 08-07-2007 03:45 PM


All times are GMT -6. The time now is 12:41 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.