500 hp combos

[grumpyvette]

this is interesting and probably a good deal compared to most kits I see, listed as a 500hp kit

 

http://store.summitracing.com/default.as...p;x=35&y=12

 

TFS-K314-500-450 is the part number. Summit has it for $1750

 

I find this kits info mis-leading in that they don,t go into the short block requirements NECESSARY to make the combo work

(youll need something like a 350-406 10.5:1 cpr shortblock)

Im running a set of TRICKFLOW heads on my 11:1 cpr 383 and Im making just under 500hp (N/A)( before the nitrous) but thats because I sellected to build an engine with a cam designed to maximize the potential of the 200hp nitrous system Im running, not the (N/A) results, theres nothing wrong with those TRICKFLOW HEADS that a mild port and bowl cleanup won,t fix, infact after that minimal work the heads slighly outflowed the 195cc AFR heads out of the box flow figures

 

Ive built several 383-406 sbc engines using

 

CROWERS #00471 hydrolic roller cam

 

http://www.crower.com/misc/cam_spec...=00471&x=28&y=4

 

and CRANES

 

# 118551 solid roller cams

 

http://www.cranecams.com/?show=brow...rtType=camshaft

 

with 10.5-11:1 cpr that exceeded 500 N/A hp

 

they require a 3.73-4.56 rear gear and a 3000rpm stall converter, plus other mods to work correctly

 

theres many other combos that will get you a 500hp sbc, and you don,t necessarily need a roller cam or those cylinder heads either, BRODIX,AFR,DART PRO 1 and several hundred cams can get you there

 

example

 

http://airflowresearch.com/articles/article85/A-P1.htm

 

http://airflowresearch.com/articles/article09/A9-P1.htm

 

http://airflowresearch.com/articles/article14/A14-P1.htm

 

http://airflowresearch.com/articles/article94/A-P1.htm

 

http://airflowresearch.com/articles/article16/A16-P1.htm

 

http://airflowresearch.com/articles/article31/A-P1.htm

 

http://airflowresearch.com/articles.htm then look in / SB Chevy Articles/AFR Article Archive

[jnjdragracing]

Is that 500hp at the flywheel or rwhp? Just curious......... I just finished with the dyno for rwhp and the numbers were not what I thought they would be. But at least I know now.

[grumpyvette]

most kits and crate engines engines are rated at FLYWHEEL HP

[grumpyvette]

just some info youll need to make an informed choice

 

a big block chevy CAN be assembled from readily available parts that weights close to or even less than a small block using expensive options like an aluminum block and heads,intake,water pump, etc.......but lets look at the more comon style combo with an IRON block and aluminum heads, intake, water pump. youll be about 80lbs-90lbs heavier than an iron small block combo, but what do you gain for that extra weight?

first you gain much better flowing heads,larger stronger rotateing assembly and potentially at least a larger displacement, and better engine cooling, a wider head gasket seal area between the cylinders, and generally significantly more hp at the rear wheels if both engines are built to a similar hp per cubic inch level of power.

lets look at that!

lets assume your sbc corvette weights 3500 lbs and has a 383 stroker based on the comon 350 block, producing 470hp

a similar big block stroker would be a 496, this gives you a 113 more cubic inches, if both engines make about the same 1.23 hp per cubic inch that small block makes the big block will make about 608hp but the car would weight aproximately 120 lbs more, yet the small block with 470hp is pushing 7.44 lbs for each hp, the big block combo even thought its 120 lbs heavier(engine plus accessories) has only 5.95 lbs per pound to accellerate...........approximately a 20% advantage, now both engines can be made larger, or more powerfull but the ratio and potential advantages only get slanted even more in the bbc favor

 

info/examples

 

http://airflowresearch.com/articles/article69/A-P1.jpg

 

http://airflowresearch.com/articles/article73/A-P1.jpg

 

http://airflowresearch.com/articles/article71/A-P1.jpg

 

http://airflowresearch.com/articles/article76/A-P1.jpg

 

http://airflowresearch.com/articles/article52/A-P1.jpg

[dr_hunt]

Grumpy, it's deeper than that. It's misleading in that it also doesn't tell you what drive train mods are going to be necessary to make that combination work either. IMO if you put that combination together on a stock shortblock and stick it behind a stock TH350/400 with a stock converter and some 3.08 rear gears it's going to be a dog of dogs. It's not just the engine combo, it's the entire package.

 

I also believe that to be Flywheel HP not RWHP, which would necessitate 600+HP at the flywheel.

 

What numbers did you lay down JNJ?