S/R torker heads 170cc runners 2.02 in 1.60ex. valves 67cc combustion chambers. edelbrock tes headers (i got twin cats) and comp cams 1.6 r.r's cam is L98 stock 207/213 .415in .430ex with 1.6 lift jumps to .445in .460ex (stock cam is brand new installed by previous owner)also ported base ported plennum afpr. budget does not allow for new cam goal is 300hp pass emisions maintain good mileage 16-20mpg
heads 640$
headers 340$
roller rockers 145$
GTA 5.7 tpi
700r4
3,27 posi
i am gonna put the order in soon and need second opinions...... thanks

 

Here is my combo and it shold have minimun 300hp:

max ported SLP runners
hi-flo intake
ported plenum
hedman headers
cut out before cat (very good mod)
catback (don't matter at the track since i have a cut out)
and extreme energy cam and 2100 rpm converter; 3.54 gears with tall tires (brings the number down to like 3.30 or so)

I also have a 58mm TB which I would trade for a 52 mm anyday. I lost a lot of torque with the 58mm
stock heads (except springs)

Good luck, Rick

------------------
'88 GTA 350 Full of Leprosy (rust)
Full Exhaust, Free mods, Xtreme Energy cam, Intake Pieces and 2100 RPM TQ

13.39@102.50 MPH
1.90 Sec ----- Best 60FT
104.23 MPH -- Best Trap Speed
AIM HIGH!

 

That's a roller cam right!

Calculating with it being a roller cam you're lookin' at about 315HP at the crank! That's about 250-260 RWHP! Should be close to if not over 400RWTQ though! Very nice torque numbers and with a roller cam you'll be getting all that torque right away!! You should be able to spin the tires at will on that thing!

 

yes it is a roller cam. the previous owner rebuilt the motor but used all GM stock parts (he restored the car and worked at a GM dealership).i Will probably get the SLP runners. i just wanna surprise some cobra's and sneak some 4th gens. anyone else?

 

I would say you are around 300hp, though I would find someway to put a cam in there. Nothing too wild, just mild. Though you will not be reaping the full benifits of that "bench calculation" that 86TpiTransAm did because you computer is not going to know what to do with this stuff. You will need to get a computerchip eventuall then you will be at about 315hp because you computer will be able to tune for the parts you are putting in.

------------------
89 Trans Am Turbo 3.8L All stock 43,000 miles #1053 of 1555

Past Thirdgen:
86 Trans Am w/ built 355TPI with SLP goodies and too much other stuff to List. One sweet *** car, wish I would have had a good enough Job to pay insurance on three cars so I could keep it, but for a 89 Turbo Trans Am w/ Low miles, I think I made the right choice!

 

i have a performance resource chip in in now...would i need a custom one after mods???

 

Actually my "bench calculations" don't compesate for such things as better exhaust, ported plenum, modificed chip, etc so my calculations are pretty accurate and actually probably a little LOW!!

 

86TPI then how are you calculating? Just wondering.

Your chip will run and run well, but later if you get a custom chip it will run like a dream. Seriously ask Glen91GTA and he will tell you what you will need for that combo. He is kind of the resident expert on chips now.

------------------
89 Trans Am Turbo 3.8L All stock 43,000 miles #1053 of 1555

Past Thirdgen:
86 Trans Am w/ built 355TPI with SLP goodies and too much other stuff to List. One sweet *** car, wish I would have had a good enough Job to pay insurance on three cars so I could keep it, but for a 89 Turbo Trans Am w/ Low miles, I think I made the right choice!

 

do not get nthe saga oflost performance runners aka SLP they will slow you down man. they cost me 2 tenths and 1 mph in the traps. i have about 300 hp at the crank. i recomend the acell of the arizona speed and marine runners. the roller rockers are going to be 200 bucks unles you jhave screw in studs and guide plates on your car.

------------------
90 IROC l98
last season best corected 13.62 @102
mods
full exhaust, AFPR, pulley, jet stage 1 chip, billet servo, 52mm throttle body, slp runners and some 1.6 RR's and a few other little things.
243 RWHP and 342 RWTQ with hot engine and 90 octain fuel

 

u r right the rr's cost me 191$ and i got the heads for 640$ and 25$ to machine out the pushrod guide holes in the heads..

------------------
white/gold GTA ,leather 5.7TPI 700r4 3:27posi twin cats,3"catback,aluminum d.shaft ported plennum,afpr,8mmwires,k&Nand all other "free" mods, performance resource chip,SLP cold air intake.

 

Greg, did you gasket match your plenum to the runners by removing the divider from between the siamesed ports ? If not, email me for details. I don't see why the SLP runners would have slowed you down, other than the potential of turbulence by running them with an unmodified plenum. To see what I mean, Check out: http://www.isthq.com/~dan/efi.html

--Dan

 

is the engiine a stock short block if so those 67 cc heads just duimped your compression in the toilet consider the rule of thumb .1 of compression verses 1 cc of volume added to or subtracted in the heads that means from a 9.3 to 1 stocker to a 8.4 to 1 with 67 cc heads stay away from the slp's use edelbrock and have em ported or as&m if you wanna see some improvement spend your money on a shift kit and a vigilante converter that'll get you to smoke a new cobra!!

 

If you are really on a budget, then you should not buy new parts, and look for deals. I've seen ZZ4 cams in the classifieds for like 50 bucks, and that is a much better cam than your stocker, whether it is new or not. Run that cam, and get those heads ported first. Do the internal mods first, then you won't have to take everything apart later. Buy some used headers when you get the cash. Buy some roller rockers when you get the cash, etc. Do the internals first, then add on more of the external(headers, rockers,) go-fast stuff later.

 

hmmmmm.... every guru i spoke to claimed that i would go from 9.3 to about 9.0 in compression.... not a significant loss.. and that the flow of the heads would out way the .3 points in compression and that if i was worried about it i could get thinner commpressed head gaskets to make a little back up...would milling the heads be worth the xtra cost and effort. would the heads then fit properly after milling...

 

If you mill the heads you have to mill the base too.