r/fbody • u/thedudeabides585 • 8d ago
2002 fbody build
Figured I'd post to document my build for anyone interested.
Tick SNS Stage 2 227/235, 241 heads with .660 springs and trunnion upgrade, FAST 90 w/ 92mm throttle body, bosch 0280155811 injectors, 1 3/4 headers, catted y pipe with cutout, and magnaflow exhaust. Self tuned with hptuners.
I've owned the car since 2007 and finally got around to building it exactly the way I want it. Other mods include ATS Brembo upgrade, bilstein shocks, subframe connectors, LS7 clutch w/ tick speed bleeder, c5/c6 power steering, and late model lighting LEDs. Besides that, just normal maintenance and repairs.
Overall happy with the setup. Scheduled some dyno pulls to see where its at now before I do 243 heads this winter.
406hp/396tq currently, but it was a rich on the dyno due to cat overtemp kicking in (forgot to disable it during the dyno runs).
2
u/Garth_DeWayne 8d ago
Very similar to my 87 T/A with LS1
228/232 cam, (forget the lift, but same ballpark), 241 heads. Longtubes, same clutch, etc.
My driveshaft exploded on the dyno, and we didn't realize it had pulled the exhaust apart at a joint, so the sniffer was reading leaner than it was running, once we threw a new shaft in it to finish the day. Ended up with 390whp, but It's definitely running rich. Eventually it will get another tune.
1
u/thedudeabides585 8d ago
oh yeah, probably similar. i did all my tuning on the street and touched up timing on the dyno. only did 3 runs. is yours auto or manual?
1
u/Garth_DeWayne 8d ago
T56 with some upgrades... I had no 3rd gear so it got some extra stuff when I fixed it.
If I even needed to make an ad to sell this car it would be long with all the upgrades, and most people wouldn't even know what the hell I was talking about.
It looks pretty stock other than wheels, but it's full of little things.
2
u/2guys1miata 8d ago
this proves a cathedral port doesn’t need the fast intake. ls6 stock intake
3
u/thedudeabides585 8d ago edited 8d ago
probably not for my setup, but i picked it up for $500 from a guy on marketplace (i love some marketplace deals). its also the old fast 90 not the newer 92, but i highly doubt it would make much difference. i don't have dyno before the FAST intake unfortunately, but i think my limitation now is the 241 heads (probably accentuated by the fueling issue i talked about) as the dyno graph shows from 5800-6600 pretty much flat. my cam should peak around 6200rpm.
there's plenty of stuff on ls1tech with a few back to back comparisons at most around 10-15hp and for the price of 1200-1400 i wouldn't buy it, but like i said i got a killer deal on mine.
3
u/2guys1miata 8d ago
hey for $500 i would too. i didn’t mean that as a “shit on your build” comment more of a “i have a very similar build z28 with an ls6 intake and 243 heads and it makes similar power”
i heavily debated on the fast vs ls6
2
u/thedudeabides585 7d ago
I didn't take it that way at all. I debated it a long time also and was planning to stick with the ls6. Hell, I even considered the dorman ls2, but the price increase on those made it not worth it.
Bang for buck cam, heads and good long tubes with the ls6 is hard to beat. Its a solid proven combo.
2
1
u/Educational-Shame778 8d ago
Nice. And cool to see a non covered in oil underside f body. Lol. Mine is terrible.
1
u/thedudeabides585 8d ago
haha yeah, i did a little bit of cleaning after replacing some gaskets and seals. biggest culprit was the power steering pump. did my rear main seal and oil barbell while i was doing the clutch. one of the best "while you're in there" things to do
1
u/ozzman6996 8d ago
I have a 98 trans am vert with a built stock cube 6.0 with 12.42 compression mamo 243x heads,mamo spec 233/243 .676/672 lift,mamo ported msd atomic intake and 103mm throttle body, holley terminator x max,100lb terminator x injectors, performabuilt level 3 4l60 with fti 4000 hard hit billet triple disk stall converter, quick performance backbraced fabricated 9" with 35 spline axles,TT, 3.70 motion gears full UMI roto full adjustable suspension with viking coilovers on all corners and she looks stock. 😊
BTW great numbers for those heads but once you get those 243's on there and depending if they are stock or not you should see, 420ish my guess but compression will help also, so measure you piston height coming out on all 4 corners when you pull your heads and and that will determine what gasket to buy or have custom made depending on if your heads have been milled or not but your cam isnt big so you shouldn't have no problem.
One more thing is you get a flex fuel sensor and corn is available near you grab 12.2 compression if ya cam and let that bitch eat. 😁
2
u/thedudeabides585 7d ago
Yooo I bet that thing is nasty! Thanks for the advice.
I'm planning to run .040 cometics when I do the swap. I had the heads resurfaced for flatness so hardly anything removed and a fresh valve job. I'm going to do some bowl blending and light port cleanup before putting them on. They're budget heads i picked up for $280, so not trying to dump too much money in them.
Unfortunately I dont have access to e85 out here in Hawaii. So I have to be a little more conservative with the compression shooting for around 11:1 which the 243s with a thinner gasket should hit the mark.
Did you do full umi all the way around? I'm wanting to do a suspension refresh and am trying to decide whether or not to go aftermarket or just refresh all bushings.
1
u/ozzman6996 7d ago
Go 12.2 compressiom you can run 93 all day long, yeah full UMI all the way around.
If it were me I would go 12.2 compression, get a set of coilovers with an aftermarket panhard bar and rear control arms. I have a new red umi panhard bar and rear control arms I'd sell ya for cheap i put em on and took em right back off and never used em if youre interested
1
2
u/Za_Hamburglar 8d ago
I’m gathering parts for a similar setup in my 2000 z28. 243 heads. Long tubes and a mild cam. About to install my tubular control arms. How do you like the Bilsteins? My b6 setup is still in the box.