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  #16 (permalink)  
Old 04-24-2015, 11:12 AM
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Hmmmmm...... After that lecture I'm gonna go make a quick change to the parts list.... WAIT WAIT WAIT a stroker getting how much RPM? I've only seen built 383's getting as much as 5800 TOPS, let alone a longer stroker such as a 396.

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Old 04-24-2015, 11:16 AM
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In a 0-40 mph race I would race you with the wifes CRV.
https://www.youtube.com/watch?v=6AlfUKKP81o

fyi my 1980 Camaro weighed 3915 (small tank)
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Old 04-24-2015, 11:19 AM
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Your listening too info of others were you are at that are totally untrue.


Pay attention here!!
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Old 04-24-2015, 11:38 AM
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SBC in the 283-434 range run 7400-7500 through the traps every day, all day long. Some much higher.


Build a BB whatever with the correct components and they do it all day long.
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Old 04-24-2015, 11:41 AM
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Quote:
Originally Posted by Devildude24 View Post
Hmmmmm...... After that lecture I'm gonna go make a quick change to the parts list.... WAIT WAIT WAIT a stroker getting how much RPM? I've only seen built 383's getting as much as 5800 TOPS, let alone a longer stroker such as a 396.
5800 rpm 383 is what I call a truck engine

Probably only 5800 rpmbecause of hydraulic cams and poor heads, ....I could easily put a 383 together to turn 8500 rpm if you want it, but the valvetrain gets expensive when you start chasing rpm like that, and the big heads to actually flow enough air at that rpm aren't cheap either.

None of this 180cc or 195cc intake runner volume 2.02"/1.6" valve diameter generic stuff, 220cc or bigger runners, 2.08-2.125"/1.625" valves.

The 383 I built for a friends mini-tubbed '67 El Camino turns 7800 rpm no problem, and it is nothing fancy....SCAT cast crank, 5.7"Eagle SIR rods, TRW forged flat tops, 11.2"1 compression, roller cam, 825cfm BG Demon carb, Racing Head Service/ ProAction Iron Lightning 235cc heads ...been together 6 years now. $3400 engine, only stock part was the 350 block.
My 406 gets turned 7400 rpm, and it is just stock 400 crank and stock 305 rods w/ARP bolts, TRW forged flat-tops, solid flat tappet cam, etc and its been together for over 10 years running street use and at the drags 2-3 weekends a month....drive it to the track, run mid 11's, drive it home on pump gas. $3000 engine.

Not rocket science, just proper parts in the proper places and good machine work, so build as large engine as you can afford in the block you choose to use.
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Old 04-24-2015, 11:48 AM
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You don't need to go 6500 rpm or higher to be fast. Consider more than rpm when you want to go fast. HP, cubic inches, and torque should be your main factors. And if your engine builds those at under 6,000 rpm, then you'll be much quicker in 1/4 mile than most of the street cars around you.
I never take my 454 BBC over 6,000 rpm (intentionally!) and I'm pleased with how it holds it's own against cars that wind to 7,000 rpm easily.
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Old 04-24-2015, 12:04 PM
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5800rpms tops out of a 383 sbc.?? Whoever put it together; don't let them touch your stuff. You can spin a 455 Pontiac higher than that these days; for very little money.
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Old 04-24-2015, 12:27 PM
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Hmmmm.... Duely noted guys. So what did that 383 make? And if its only $3400 it beats the engine I have now at $5500.... I'm gonna go with a 383 now, for sure. Hmmmmmm....... I'd like a lower compression than 11 though, I'd like ?10.5:1 if I could.....
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Old 04-24-2015, 01:08 PM
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Quote:
Originally Posted by Devildude24 View Post
Hmmmm.... Duely noted guys. So what did that 383 make? And if its only $3400 it beats the engine I have now at $5500.... I'm gonna go with a 383 now, for sure. Hmmmmmm....... I'd like a lower compression than 11 though, I'd like ?10.5:1 if I could.....
It pushes the 3650lb El Camino down the track at 11.10's @ 117 MPH on pump gas, 10.60's @ 122 MPH on a 175 HP nitrous shot w/race fuel.

No idea how much power it makes, never been engine dyno'd. Easily 550+HP though, to put that much weight at that time slip.

Skip White(whiteperformance1) and Fred White(WhitePerformanceMachine)on Ebay have some real good deals on 383 stroker kits at the $1000 or less level. Here is one example: 6.0" rods
383 Assembly Scat Crank 6" Rods Wiseco 030 Flat Top Pistons 2pc RMS 5 64 6 0 | eBay
5.70" rods 383 Assembly Scat Crank 5 7" Rods Wiseco 030 Flat TP Pistons 2pc RMS 5 64 5 7 | eBay

You'll find some kits $50 or so cheaper with Eagle cast cranks, but the SCAT cranks and SCAT rods are considered much better pieces. You'll also find cheaper kits with Hypereutectic pistons in them, but Forged pistons are much stronger. Many cheaper kits also don't include harmonic damper and flexplate.
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Old 04-24-2015, 01:14 PM
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A car running 11.1s at 117 mph is leaving hard,obviously the owner knows how to tune the car and is using slicks. A $3400 dollar engine is possible if you do a lot of the work yourself. Great post Eric
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Old 04-24-2015, 01:41 PM
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Quote:
Originally Posted by vinniekq2 View Post
In a 0-40 mph race I would race you with the wifes CRV.
https://www.youtube.com/watch?v=6AlfUKKP81o

fyi my 1980 Camaro weighed 3915 (small tank)
Funny stuff Vinnie, LMAO.....
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Old 04-24-2015, 01:47 PM
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Quote:
Originally Posted by vinniekq2 View Post
A car running 11.1s at 117 mph is leaving hard,obviously the owner knows how to tune the car and is using slicks. A $3400 dollar engine is possible if you do a lot of the work yourself. Great post Eric
1.54 second sixty foot, on 315/60-15" Mickey Thompson Drag Radials(basically the same size as 30 x 12.5 ET Drag slicks), Powerglide trans, 4000 stall, 5.13 gear.
The 5.13's are just a bit too much, should have either 4.88's or 4.71's...but the owner is just happy running the hell out of it.
A lot of people still think that it's a lot of gear, but it is a TALL tire.

The roller cam, harmonic damper, and aluminum timing cover were all bought used, everything else was new. Cam is a Herbert, scored for just $67 on Ebay.

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Old 04-24-2015, 04:05 PM
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. Of course a big block would fit, it was an ordinary option earlier in that body series... but a hot small block will blow away the big blocks they were using by then... even the earlier ones...


. We don't talk stroke:bore... we talk bore:stroke... and a 383 is still an oversquare engine that likes to rev with bigger 4.030" bore compared to still smaller 3.75 stroke... and, like Eric correctly pointed out, by '78 Camaros had gotten heavy, so more cubes/torque comes in handy...


. The RPM intake and 750 DP would work well on the new engine...


. Building an engine that gets good MPG isn't just about MPG, it's a more efficient engine... and an engine that uses half the gas for the same power lasts longer with half as much gas washing the lubrication off the cylinder walls... and all the gas burning instead of washing off lube and polluting the exhaust...


. LOL! Just got interrupted by a loud noise, a long trailer full of dirt track cars just arrived for the build/storage building behind my garage... wasn't sure if it sounded like a car or a motorcycle out there... OK, where were we?


. Sometimes gauges can be all 'hooked up', but not work because the instrument panel lost it's ground connection, very common...


. The 305 should have idled fine with the 750 DP... it just wasn't tuned right... or it had a huge cam...


. Any cam above a 208/208 is going to lope at idle... each step bigger makes the lope worse... the lope is actually an undesirable side effect of bigger cams... but I know kids think they want one like other racers have... kinda like a fart can muffler on a poseur ricer...


. Didn't we explain all this to you before in a different thread?
.
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Old 04-24-2015, 07:05 PM
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No, I don't think you did. I'll look for a good cam and I'd like no more than about 240 of duration with like 110 or 108 lobe separation. I'll see what I can find..... Otherwise, I'll build that engine to be pretty wild. The guages have good ground, that's always what I check first. They just got old after a while I suppose....plus the last owner did some awful wiring.....
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Old 04-25-2015, 08:51 AM
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GM staggered the rear shocks in an attempt to cure some annoying wheel hop. An attempt. Possibly you are in the planning stages of the suspension and may want to research the issue. This thread sure brings back some memories.
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