Hey guys,

I've been debating on which setup to follow through with.


AP1 bumper OEM lip, $150 painted, splitter $300, sell j's= net $250
APR Bumper (no splitter), $800 painted, sell oem bumper & j's = net $400
CR Bumper (no splitter(, $960 painted, sell oem & j's bumper = $560 net

I was curious which would be more beneficial to a stripped track car.

My current setup is:

AP1, oem intake w/ snorkel, oem header, j's 70rr exhaust vafc2 (for now) 215whp approx
Ap1 wheels/ tires (until the 6ul wheels come out, then 17x9/17x10 & 235/255)
Apr Gtc-200 rear wing on 2.5" risers 0 AOA
OEM Shocks/ skunk 2 springs (kw variant 3's next) Max camber/caster, 0 toe front 1/8" in rear.
Gutted interor except for dashboard.

Planning on running either J's or APR rear diffuser eventually also (thoughts on this also)

Any and all advice/ criticism is welcome & appreciated.

Thanks

J's

 

i think diffusers and underbody panels will give you less drag

 

I ran the APR GTC-200 for the first time today at Buttonwillow, and all I can say is even with positive angle (pointing approx. 1.5 degrees up), I got mostly understeer in high speed turns. With 2.5" risers and 0 degrees, I would expect even more downforce in the rear.

I don't know about the J's lip, but I hear the AP1 OEM lip is virtually worthless in terms of generating downforce so I wouldn't even bother. I would even say dump the J's lip, and go with a CR front end or APR GT Front Bumper. I will most likely be picking up a CR front end to get some more front end grip.

 

Y would you have your wing pointing up

The j's lip is more for the canards and oem lip is simply to mount the front splitter lower to the ground to be more effective.

 

^ Oh, okay. If you meant splitter instead of diffuser in your original post, then yes, I would go with the OEM lip and the splitter. When I hear diffuser, I think of things that go on the underside of the rear bumper, and when I hear splitter, I think of things that go on the underside of the front bumper.

As far as running positive angle, the air that is traveling above the roof and toward the trunk is at a downward slope, so you can see that even at a slightly positive angle, there is negative angle of attack that generates downforce (I'm not sure if I'm using positive/negative correctly, but hopefully you get my point). The APR's lateral sections are at approximately 10.5 degrees negative (pointing down).

 

Makes sense!
I like the apr front also, but @ $800ish painted, minues $400 for my bumpers, would it be as equally effective as the oem lip/ splitter comination Or better yet if i were to run it for now and then in the future get teh puddy splitter also I presume that would be better than the AP1 bumper/lip/splitter combo?

 

^ I actually have no idea. I just look at what all the fast guys are running and figure if they're fast, then they know what they're doing, and if they know what they're doing, I might as well copy them. Haha. Among the super fast guys, I know there's a guy running AP1 OEM lip with APR splitter and a few who are running a CR front bumper. I actually haven't seen an APR GT front bumper out on the track... but I have seen some APR front lips used with and without splitter.

I don't think you can really go wrong with any of these choices, and you can always fine tune balance by adjusting your wing angle. It boils down to cost and, if it's a concern, looks.

 

This is something i have always wondered about too. I want my car to be more aerodynamic AND have some more rear downforce but its just so much money to buy and paint aftermarket bumpers.

 

The two surfaces have very different purposes, so it's hard to guess. But I would put my money on a spliiter, as long as the nose is low to the ground and the splitter is big enough to be for more than looks.

Unfortunately, those two things make it hard to use on the street.

 

don't care about street use as much as my car only goes out to meets maybe twice a week and I'd take car of it then (slower driving avoiding potholes).

The highways/ roads be me are actually very well maintained

I'm definitely going splitter now the question is oem lip, cr front or apr