How much power do you think i wil make with...

GM Performance crate 350 bored .30 over
Forged alluminem flat top pistons (least what they told me)
Edelbrock Performer RPM Pro Flo MPFI 29lbs hour injectors
Edelbrock Performer RPM 64cc heads
Edelbrock Performer RPM Cam power is idle to 5000
Roller tipped rocker arms
TCI 700R4 transmission
B&M 2500 stall torque converter
stock rearend
electric fan
straight piped (installing flowmaster 80 series cat back)

The shop told me i should expect 400+hp what do you guys think

 

I used to have a very similar setup and we are about the same elevation. the most I ever made on a chassis dyno was 320rwhp and about 305 ft lbs.

I highly doubt you will make more than 350 if your lucky on a chassis dyno.

 

I got it dynoded with a stock 350 with hyperneutic pistons, without the roller tips, manual fan and flowmasters and it pulled 260rwhp and 303rwtq. But they also did a real crappy tune job. Dont take your car to the carburator shop in longmont colorado

 

I would say no more than 1 hp per cubic inch, i am assuming the stock intake, you are probably looking at 400ihs ft lbs of torque.

 

No the fuel injection kit came with the edelbrock Rpm air cap intake

 

I missed that, sorry, 3 hrs of sleep, i call it 365 hp.

 

to the ground or flywheel? Cause im tired of being beet by my friends f***ing Subraru WRX STI Dang all wheel drive

 

flywheel,and tell your friend to run you from a 20mph roll, assuming a stock subaru you will kill em.

 

k i will try that.

 

do you know the specs on the cam? or what the CR is on your motor? im assuming you'll be around 350-360 to the wheels if its around the same specs of a 350HO but with aluminum heads and a little hotter of a cam

 

He sais the cam is to 5k, so i guess it is the dinky one, thats why I say arround 400 ftlbs though.

 

They said CR should be around 10.1
Which is awesome now but in the summer im adding the PS series procharger. So i will have to replace the pistons. Cause they say you need a lower CR
i went with the smaller cam for the low ned power for street racing.

 

You did not have to go with that small of a cam for the street but it will react verry well with a blower.

 

True thats what i was told when i bought it. Cant wait tell i buy it. But i cant decide on new paint or a procharger

 

who cares what it looks like if its fast but on that note, the stock ls1 guys are running 7lbs of intercooled boost on the procharger kits and their CR is up around 10:1, so i dont see why you couldnt run a similar set up and just upgrade the pistons and go to a smaller pulley down the road, especially if you JUST got the motor, you may as well just have bought a custom one for blower if you wanted to go in that direction.

 

Nope. Gotta remember, the LS1's have a MUCH better chamber design, reverse cooling, they pull timing, add fuel, and the intercooler makes a HUGE difference. Pull compression out or dont boost.

 

Yeah i plan on painting it again this spring so i can take it to some car shows and hopefully win crap. Then i will buy the procharger and lower CR pistons. They say you can allso bbuy 78cc heads instead of my 64cc but i all ready spent $1000 on them all ready so i will go with the pistons.

 

They have conventional cooling.

Get aftermarket aluminum heads of a modern design and you're in the same place they are.

 

LS1's are still two valve SBC with a decent chamber design. The reverse cooling is the only advantage over a Gen1 with good heads. Most of the LS1 engines I have read about using decent boost come apart just like an improperly done SBC. More fuel and less timing can be a bad thing depending on how far it is taken.

 

again, LS1's do not have reverse cooling.

LT1s did, and GM found that it caused too many problems with their service dept monkeys and went back

 

Did they really? News to me. What problems did they have with it?

Junk, anything is bad when you go too far one way or the other. And when I made that statement I was sorta referring to a stock style head, not a modern aftermarket aluminum head. Had a brainfart and didnt mention it. Thats what happens when you hit the ripe old age of 24.

 

I was curious also so i did some searching:


"The LS1 block also eliminated the reverse cooling that the LT1’s had. The reason LT1 reversed cooled the motor was to make more power, by increasing the compression. But the LT1 cooling method was nothing more than a fix that allowed the limited cooling of the old Small-block head to work with the higher compression necessary to reach the 300 horsepower level. The problem with reverse cooling caused air bubbles flowing upward and coolant flowing downward. Air in the cooling system causes problems around the combustion chamber, which causes localized boiling and that, in turn, allows hot spots to develop on chamber walls which cause detonation. It was difficult to keep air out of the GEN II cooling system. The LS1 featured a brand new composite intake, which weighed less, and ran cooler. "

 

Well, take out the marketing hype and you get “we couldn’t get our mechanics to use the bleed valves correctly and ended up with too many warranty services for overheating…”

I would argue that Dexcool is actually a bigger problem, but that’s another story…

The rest of that (detonation/running cooler…) is just BS, with the LSx engines they dropped compression a point also to compensate for going back to regular cooling…

 

News flash..

I just got it Dyno'd it makes 430rwhp and 450rwtq. The pistons are 11.5 compression forged flat tops. Which actually sucks cause i wanted to Procharge it but thats okay ill just have to swap them out again when i do buy it. also im founding out that my stock rearend and drive shaft cant take the power. Which gives me an excuse to tear it all out and install 3.73s with a detriot locker and an all alluminum drive shaft.

 

not calling bs, but that borders on being unbelievable.

 

Why? Well thats what they told me so i guess i need to get a real dyno sheet made up. So i can make you unbelivers understand

 

them numbers are offf ........

 

well, mostly because a lot of the setups i see have similarly sized(or larger) cams but about 35+cfm more on the intake ports. there are some amazing combos out there like 89transamGTA, he has a small cam, a super ported tpi, and good heads and puts down around 415rwhp.

like i said, i'm not calling bs. i'm just interested in the dyno sheet.

either way, your friend with the STi is seriously F'd.

 

post pics of dynosheet or b.s.

 

I wish. he has the same power but he has all wheel drive and i still have my stock one tire wonder rearend (which is about to grenade) And yes i plan on getting the dyno cause i think they did engine power and told me wrong so i would be happy i dont know. I can tell you this though i can break the rearend loose at 35 with that 2.73 rearend so i would GUESS you would need alot of power to do that. Right?

 

A 350 with that kind of power probably wouldnt make enough torque to break the tires loose at 35.

 

Well i floor it at 30mph and all i see in the rearview mirrors is smoke.

 

Thats because youre blowing smoke out your ***.

 

single track or worn-out posi on narrow tires? It is possible but not with a good posi and sticky tires.

 

i have a factory rearend with no posi. With BFG Radial TA 275/65/R15 i think thats the size if i remember right.

 

No posi and the king of burnout tires, no wonder you're seeing smoke.