i was wondering if anyone had a dyno program and if they had any spare time or ambition to check a combo for me chevy 355 with afr 195cc street eliminator heads and a crane energizer cam with 286 adv duration and a gross lift of .465" with a edlebrock performer intake and eldlebrock 750 carb and hooker headers
Yes I've got Engine Analyzer pro, and I don't mind running it for you.
But I will need some more info to get better results:
- Compression?
- quench?
- Size of the headers? 1-3/4?
You can guesstimate the squish depending on whether or not the block has been decked and what kind of piston you used, along with the compressed thickness of the gasket.
If you used a cheap, rebuilder type piston, then the piston compression height is probably around 1.540" and the squish will be in the toilet with a virgin, un-cut block and a standard 0.040" compressed gasket.
Add up the stack. Half the crank stroke is 1.740". The rod is 5.700". The piston is 1.540". This adds up to 8.980" Subtract this from a virgin block deck height of 9.025" and you get the piston down in the bore 0.045" at TDC. Add a standard 0.040" gasket to this and the squish (or lack of squish thereof) comes out to 0.085". If this is what you put together, chances are that the motor will detonate on pump gas at 10.0:1
If you used quality pistons that were manufactured with a piston compression height of 1.560" (or 1.561" in the case of KB hypers), then you may slide by with a squish of 0.065". If you used 1.560" pistons and a head gasket thinner than 0.040", you should be fine on pump gas.
As a side note, in my opinion, you did a good job of matching the cam to the c.r. You should also get a nice rump-rump out of it with the 106* LSA.
i am going to be using seal power hypers if that is what the machinist said or something similar to that with moly rings which he says they dont need to be worked as much as the kbs the deck has not been milled and 0.040 head gasket
OK got the results.
I am not very familiar with chevy's but a 355 is a 350 bored 0.030" over, correct?
The results are valid for testing the engine on a dyno:
- No exhaust system
- Electric waterpump and fan
Info you minimally need for a decent result:
Block:
- bore x stroke
Head:
-flow for intake and exhaust
-valve sizes
-compression
-squish<0.060" yes/no
and preferably port lengths and diameters at faces
Intake:
-type of manifold
-cfm of carb
and preferably port lengths and diameters at faces
Exhaust:
-primary pipe diameter
-primary pipe length
Cam:
-type of cam
-open and closing events @0,050"
-cam lift
-rocker ratio
and further type of fuel if not gasoline
thanks alot for you time i appreciate it that made some nice torque and some decent horsepower ill probabaly go with that cam and i am probabaly gonna buy that desktop dyno yea a 355 is a 350 bored 30 over
Jarrett
Just a note. I think that he used a program called Engine Analyzer Pro. This is from Performance Trends. They have a "light" version for considerably less money, called simply Engine Analyzer. Desktop Dyno is an entirely different (and dare I say, IMHO less effective) program. I am not familiar with DynoSim advanced, as mentioned by TechInspector.
Jarrett
Just a note. I think that he used a program called Engine Analyzer Pro. This is from Performance Trends. They have a "light" version for considerably less money, called simply Engine Analyzer. Desktop Dyno is an entirely different (and dare I say, IMHO less effective) program. I am not familiar with DynoSim advanced, as mentioned by TechInspector.
oh ok so engine analyzer is the way to go well if they have a free demo i will probabaly just use that for now as i was going to try a few crane saturday night special cams and some lunati voodoo cams thanks for all the help to everyone its my first engine im building and im just 18 working 2 jobs so i can afford to do it and i just want to do it right the first time cause i wont have enough to change it all again for a while
oh ok so engine analyzer is the way to go well if they have a free demo i will probabaly just use that for now as i was going to try a few crane saturday night special cams and some lunati voodoo cams thanks for all the help to everyone its my first engine im building and im just 18 working 2 jobs so i can afford to do it and i just want to do it right the first time cause i wont have enough to change it all again for a while
yea i already got tickets in this trans am with its stupid 305 i am using that engine analyzer pro demo it seems that everything peaks horsepower at 5200rpm and there all right below 400 hp with any cam i pick its a little strange
yea last night when i was playing around with it i clicked the afr 195 street eliminator and was wondering why my dynos were alot lower then ones on the sight and from other people but then i seen the heads on the demo were from 2003 information and i updated the head flow data and it is working just as it should i believe.
is 8 hg of vacuum at idle to low i want lumpy to rough idle but i want to have it idle on its own still?? im checking out some more extreme cams that are giving me close to 500 hp mark around 6000 rpms
With 8Hg you probably won't be able to run a brake booster.
Make sure the rest of the engine is up to making 500 hp reliably
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Related Threads
?
?
?
?
?
Hot Rod Forum
2.2M posts
175.6K members
Since 2001
A forum community dedicated to hot rod owners and enthusiasts. Come join the discussion about restoration, builds, performance, modifications, classifieds, troubleshooting, maintenance, and more!