Need advice on HP target
 

Hello, I am in the process of bumping up the horsepower and I have a list of parts I think will get me there but I would like to know if there is anything that I'm missing or overdoing. I would like to achieve a target of 350hp to the wheels and I want to know if the path I'm taking will get me there.

Lets start off with my current situation. I have a 93 Touring with 10k miles on a rebuilt engine. The engine wasn't ported and I am running the stock sequential setup. It has an aftermarket downpipe and exhaust with no pre-cat, I have a boost gauge, efini y pipe, koyo radiator, new oem ast, and samco cooling hoses.

In order to get to the 350hp, I purchased a set of n3g1 turbos, an apexi intake system, and a full greddy smic with piping from the efini y pipe to the throttle body.

I plan to purchase upgraded injectors and then finally get everything dialed in with an adaptronics tune.

I hope this is enough information to get some answers going. Let me know what you guys think. :icon_tup:

*Install an aftermarket temperature gauge.
*Find/install dual oil coolers from an R model.
*Not a big fan of open intakes in the engine bay. Shield them or better yet, find an M2 style box that exclusively sources ambient air.
*Consider a simple WI/AI system.
*Header wrap or heat coat the down pipe.
*Change plugs to 9's leading and trailing.
*I personally would not go beyond 12 psi even on the later issued turbos.
*I wouldn't 'build' to a number. It will still be fast, fun and with some reliablity.

That intercooler may be marginal for where you're looking to be. It's not that big all things considered. But, it's a good place to start, you can always sell it and upgrade.

You will need a bigger and rewired fuel pump, water injection is a great idea (as stated), might need an HKS Twinpower to get all you can out of the ignition.

Stock main cat if you have it is a massive restriction, you'd need a high flow cat or midpipe. Since you're in California, don't know if you're needing to stay emissions legal or watch your mods to make sure they aren't drawing unwanted attention.

Regardless, 350HP to the ground on the twins is doable, but it will take some work and money to get there.

Also, you'll need to consider tires, brakes, and suspension. Stock size tires will just roast all through 1st and 2nd gear with that kind of power.

Dale

You could consider porting the waste gate if the newer turbos aren't installed yet. Helpful if you want/willing to go catless between emissions testing.

All good advise above.

Here's what I have done to my car when it made 355rwhp/308rwtq, so right where you want to be.

- M2 Intake
- M2 Large SMIC
- Simplified N3C1 twins with ported WG
- 2000cc secondary and stock cleaned primary
- Re-wired Aeromotive 340LPH pump
- HKS Twin Power and all 9 plugs
- SS downpipe, resonated midpipe, Titanium catback
- Tuned on PFC at 1bar

I agree with Jim, don't shoot for a number. Target the level of boost you want to run, then build your system to support it.

^Much better put. Hp numbers are fun but how many times have we all heard "It made (insert number here)...just before it blew-up".

Thanks for the help Dale! I don't have a cat in my exhaust system so no restriction there.
I have taken tires brakes and suspension into consideration.
I already have hks coilovers which I still need to install and I will replace all bushings and ball joints. As for wheels I have tc3 18x10 for the front and 18x11 for the rear.

Thank you for your help as well! Rather than shoot for a number, I will shoot to have a balanced powerplant. I just don't know how much boost a set of n3g1 turbos can handle safely. I am not aiming for high power.

I have an aftermarket temp gauge on the a-pillar it just needs to be installed. I will definitely install dual oil coolers to help aid with cooling.

I agree. I will aim for something a little more reliable. I am not trying to max out the power.

I appreciate the help and input guys. :icon_tup:

My next question would probably be how much boost can I run safely on these stock n3g1 turbos?
Can I get away with installing everything I have and getting it tuned without having to upgrade my fuel?
If anything just upgrade the injectors or get them cleaned and flow balanced.

I suppose 350hp was too far fetched with the setup I was going to run with. Like I said before, I will now aim to build a safer and reliable setup I can enjoy rather than go crazy with horsepower.