so im wanting to up my power and from what ive been reading the rods are the weakest link on the g.... so would just lc pistons and rods be good for 600whp? i have a 60-1 turbo and only going to about 500rwhp but just want to find a little more about these engines and such... also what about the bc stroker? better for n/a or the same as boosted?

oh and if i do pistons rods and a cam what could i raise my redline to?


thanks guys

 

Hey Dudeman, for everyone's opinion do a SEARCH, this has been discussed
almost as much as "debadging!" (I like the stroker approach)
Gary

 

yea ive searched and havent got any straight up answers... my favorite one was for a stock block "they can handle 7psi" not very informative at all considering 7psi will range in power depending on turbo lol

same goes as aftermarket gears? cant find anythingggg i see all these 700+hp Gs and nothing about any gears? no dog box? wtf mann frustrating

im interested in the stroker kit as i get a discount on them from my sponsor i had when i had my sti but i know when you go with a bigger stroke you can rev out the motor as much so can someone tell me this

4.15 redline-?
3.5(little bit bigger bore) redline-?

 

I would suggest setting a goal. Ex 500 hp and what will it take to get me there. Talk to the people who are going to be building your car and ask them what they would suggest using, then ask others.

If you are going for 500hp you do not need a stroker kit. It can be gone with pump gas, rods and pistons, and other supporting mods. How many lbs is going to be determined by the turbo output and tune.

 

Shouldn't this be in FI forum? =)

 

i build my own cars just wanna get a lttle more info on these cars such as weak points and i know the stroker isnt needed for 500whp i pmd someone on a seized block on here so ill probably pick that up and depending on how high i can rev the motor with the stroker kit will be the factor on the route im going to take... and more then likely 42r or equivalent will be going on the build

 

i wouldnt boost a 4.2 engine i heard its not safe unless you sleeve the block go with the 3.8l stroker and boost it

as far as redline? i think 7.5k but im not so sure

 

darton sleeves alll the way! thanks for the input

 

picking up a long block friday!

 

Cosworth internals all the way! and If you are trying to make over 600, darton sleeving would be the way to go as well. I have been told by a few really great engine builders that stroking a motor and big boost does not go together. If you want to make more power, up your cfm. Thats just my 2 cents

 

im only going to be making around 550whp for now so im keeping the stock sleeves and doing pistons and rods... the block thats in the car now is going to be pulled and fully built after i get the new one in but its going to take me about a year to build it as i have other **** to take care and cant drop every penny into and plus i want to take my time and do everything right...

 

cp pistons rings and eagle rods are being put in the block im picking up 1179 shipped to my house picking up the rev out long block that runs for 300 so its a pretty good budget build

 

I have read this in a couple of places, no first hand knowlege mind you, for high HP VQ motors (600+), the weak point is where the cylinder meets the head. During high rpm, the cylinder itself will start a harmonic vibration that will eat up the head gaskets.



Note there is no support between the cylinders and the main block at the head/cylinder interface


If you want a high HP motor, you must support the cylinders through the water jacket to the main block. As I'm sure you know, proper fasteners and tqk specs will stop part of that.



This one is properly sleeved and supported.

 

yea this semi build will only see around 550whp so i think ill be good but like i said with the bigger build i wanna take my time and do everything right so it will take me a while to have it done which is ok since im in no rush


are those aebs sleeves in the second pic?

and its called wet sleeving when it in contact with the coolant with the holes in them.

 

That's actually a stroker kit.