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I purchased a 2005 EVO 8 MR and started modifying it for reliable and fun track days. Now I want to build something competitive but keep the mods as mild as possible. I don't care at all about higher HP, I come from racing spec miatas and the EVO is FAST!
Anyhow, does anyone
race their EVO in TT4? Any advice if I decide to move forward. My friends joke that the EVO is the fastest car ever made under 300hp, I AGREE and want to prove this!
The trouble in the medium to long term will be 2 fold. 4th gear in the 6spd, and oil starving the motor on the OE oil system. And I suppose parts availability.
The trouble in the medium to long term will be 2 fold. 4th gear in the 6spd, and oil starving the motor on the OE oil system. And I suppose parts availability.
Or so I've read.
My understanding is under 400hp and the 6-speed is problem free. And maybe the 6th gear wil be an advantage in certain tracks?
I have Infinite EVO oil pan, TOMEI slicers, and Kiggly HLA. Ive tracked the car on sticky tires and during sweeping right handers holding 60+PSI of oil!
Bold strategy, you'll have fun but winning will be tough. A TT4 Evo is going to have 280-320whp depending on how you build it and what it ends up weighing. There a lot of REALLY good platforms these days. You're going to find the competition's cars are better than yours and you'll have to really be able to wheel that car around.
The 5th gear in the 6-speed is a bit shorter than the 5-speed where it has to pull "cruising gear" duties. So, definitely an advantage on front straights.
Keep your runtimes to <=20 minutes per hour on the 6-speed.
If your goals are fun and reliability then TT4 is proably a good place to be. I haven't kept up with the rules in recent years but I do see that the AWD penalty is slightly higher in TT4 than TT3.
With the Evo you're always up against the dated aerodynamics, high factory ride height, MacPherson strut front suspension, uneven weight distribution, and overworked front tires. The modern sporty RWD cars that you're up against are much better from the factory in many of these areas. Anything you can do to chip away at these deficiencies will help.
Tires are another issue in TT4. You're limited to tires that fit the NASA 282mm template. Last time I checked a lot of 275 width tires wouldn't clear my template without maybe squeezing onto very narrow wheels, which I didn't want to do. That leaves 265s. Not bad, but many of the fast 200TW tires in 265 can still get overheated easily on our front-heavy AWD cars, especially in hot summer months.
I'm interesting in reading updates as you go along.
Run higher rear rates to help get the rotation you need on 265's. Mound them on 10.5 inch rims (or 10?). You want the section width to match rim width, or be .5 inch narrower rim width vs section width for optimal grip. Make sure your camber is perfect and you'll be good.
I kinda hate how NASA penalizes AWD in the slower classes. It makes no sense. Low power builds aren't traction limited while on power, yet the rules penalize awd in lower power classes MORE than they do higher power classes, which is *** backwards. An s2k is still full throttle at the same point an evo would be, if they were set up equally. Anyways, have fun! You going to the Ozarks for 2025 championships? I'm in Norcal now and IDK if i wanna make that drive lol.
I've been looking around for a dedicated track car; someone's got one up on racingjunk currently that I'm thinking hard on. Anyone running em really found particular gripes? Other than the weight, which is a sacrifice to the gods of looking cool and just part of the chassis.
Currently using daily civic si, similar weight distribution and certainly shows on corner entry.
