Head build up

[My98slvrGSX]

Bare with me this is my first dsm and im new to this site. im at 300whp right now and i would like to be around 350. i have a 16g turbo, fmic, injectors, fuel pump, clutch and flywheel, intake, exhaust, safc-II, etc. so to achieve 350 hp i was thinking of redoing my head. is this the right direction? or what? i dont know exactly which brands to go with (for cams,lifters,retainers,springs,etc) or what would be the best set up to go with? if anyone is very pleased with there set up and would be willing to share that be great. thanks

and sorry if this question has been asked before.

 

[craracer05]

Cams and porting will likely yeild you the most gains but you'll still be short of 50 more horsepower.

 

[My98slvrGSX]

yea i was leaning towards new camshafts and gears. would i need new springs and retainers? and this might be a stupid question but i havent gotten a straight answer from anyone around here, but if i got my head ported would i need new pistons?

thanks again

 

[407gst]

WELL THE HEAD REBUILD WOULD BE A GREAT IDEA. Go with some beefy cams like brian crower 272s and get the valve spring kit with it. You probably wont just stop at 350 and with a built head you can get a much bigger turbo than what you have and still have the same respose with spool up.
- importevolution.com is were i got mine

 

[My98slvrGSX]

dude, EXTREAMLY helpful. thanks for pointing me in the right direction.

if anyone else has any thoughts or input that be great too.

 

[snox135]

For 350whp you don't need to have the head ported. Valve spring kit depends on which cams you get.

 

[My98slvrGSX]

tight, i wasent looking foward to getting it ported. what brand would you recomend for cams?

 

[brute]

If you're on a budget, BC has the cheapest (Brian Crowers). Also, FFWD Connection has exact regrinds of the HKS 264's and 272's but they're much cheaper. They're called DKS 264's and 272's, respectively. Forced Performancehas some nice ones that are similar to the 272's called FP2's. Currently, I am running FP1 intake cam (similar to 264) and FP2 exhaust (272).

Furthermore, if you are going to keep the stock rev limit and get 272's or smaller, valve springs are not needed. High revving engines and cams with ridiculous lift are what need upgraded valve springs.

 

[absolute_DSM]

Building a head doesnt depend on what brand you get. It all depends on the numbers... all the lifts, the durations, the port sizes, etc. that best match your setup.

With that said, you need to figure out what you want this car for. Street/strip, drag only, road course only, mix of all of them...... I can tell youre looking for street car.

Youre a 2g so if youre going to stay on the street you should be good with the 2g head. You can port match the head for a little better flow. Even better you can get the intake side ported in a D shape, but thats more than youll need.
If you wanted to run more power up higher in the RPM and not need so much torque down low, then think about a 1g head swap. Bigger ports = more flow for top end. Great for draggin and ridin the road courses.

I think you should go with a 264 type of cam setup. I think that would keep you happy on the street and would allow that 16g to breath just fine.
Most cams 272 duration and up recommend using dual springs to keep the valve to the cam with the high lift and a high RPM, so you wouldnt really NEED a new spring setup.

Your stock valves would be fine, just have them touched up and have the seats ground or even better have a 3 angle valve job done. Although I think the stock head has a 3 angle job so they would basically just be freshening it up. Its not much more expensive if you wanted to go the 3 angle route, just make sure you or the shop has the right tools.

I wouldnt even mess with cam gears until you know how to tune and can use the degreeing to your advantage.

Good luck.

 

[My98slvrGSX]

absolute and brute, you guys have been a big help. yea im deff leaning towards a street car with some drag runs in there. thanks a bunch.