2.080"/1.625" stainless valves, comp 985 springs for big hyd. roller, milled

This will be a for 355 (forged) that will be boosting 5psi to start off with, and working its way upto 10psi for a while, then working its way upto 16psi with a bigger turbo

I know it would make my launches real bad, but i will have a 50+ shot to accompany me with the launches

the price is real good, so i thought I asked...

what do you think?

 

Those are real close to the AFR 220 valves....I know a good number of people running those with a 383. I'll be running my AFR 210's, which have 2.08/1.60 valves. I'm shooting for around 12-14 psi out of an S-Trim, so I'd be willing to bet you'd be ok. Plus with a 50 shot of N20, you should have no problem out of the hole. With heads that flow, your boost numbers will be lower, but more importantly the CFM will be there. I'd say go for it. Especially since you're planning on growing....

 

yeah, or i can have my stock heads machined, get stainless valves, those springs, (basically no port, just a valve job) and come upto almost a grand anyways, or very close to that price lol...

I guess I'll go with these heads

 

Worse case scenario....have a slight bog out of the hole, that which the car will quickly pull itself out of. That is until you save enough bottle caps to get a bigger ball bearing turbo!

 

wouldnt a 'bigger' turbo make me spool slower even thought its ball bearing?

plus like i said

if i ever need to race out of a whole, i will have a 50 or a 75 shot til i spool

 

A turbos spool characteristics is going to depend on the wheels you use. If you setup the turbo properly, you shouldn't need to use nitrous to get the turbo going. A good stall+transbrake or a stutter box should allow you to leave with boost reading on the gauge.

 

WHAT heads? I see valve sizes and springs.

Exactly what kind of heads produce a bog out of the hole?

 

thats the only information i have... I will see if i can get flow numbers...

what kind of heads produce a bog out of a hole? i thought the answer to this was heads that are too big the for the application...

i mean hell, then we would just put the biggest heads we could possibly find on our cars wouldnt we...

w

 

with a supercharger it will, but not a turbo...thats what the wastegate does. it keeps the psi the same no matter what!

 

thats right! i dont have no pulley

i got high tech FI

 

A better flowing head will help in any application. On a turbo system it will allow the engine to flow a given amount of air more efficiently, which in turn would produce more power at set boost level. I wouldn't see any bogging problem because of the heads. It would be in boost level, turbo, and launching characteristic of how your automatic is set up.

 

That is what a wastegate is for? Wastegate bleeds off excess. If boost level does not elevate to excess, wastegate does not open.

Less restriction means equal torque/hp with LESS boost. This has little to do with the wastegate, in this instance.

 

With these heads and the boost numbers I will start off with (5 low 10 high) the turbo will def spool and the wastegate will open maybe just take a split sec longer....

 

off topic...seal..you have the most beautiful LT1 color i think ive ever seen. wow..i wish i could paint mine that color..but that would be copying

 

I'm not really sure what you're saying... when the wastegate senses a certain amount of boost (unknowingly what the heads, etc flow) it will open the puck to bleed off EXHAUST pressure to steady the compressor at a certain speed relative to rpm to maintain a certain boost level. In SCs you have mechanical action going on that will affect this, but with turbos there's only exhaust gases at work. Even though the heads may flow more, the exhaust side of it doesn't care... when that wastegate senses a certain psi, it will limit the exhaust flow through the turbine wheel via the puck to maintain the psi boost setting.