2nd Generation Specific 1986-1992 Discussion

Goal: 160-170whp

Old 01-26-2011, 03:16 AM
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Like the topic says I'm putting my goal at around 160-170whp for my n/a s4.



Mods done so far:

Racingbeat cat-back

Racingbeat header

Cold air intake (can't remember which one of the top of my head) (also unshielded at the moment)

MSD ignition

a/c and power steering removed

Koyorad radiator

Most emissions removed

All drivetrain should be good for the power already with the new clutch / flywheel and everything I've installed

Streetport (supposedly... I actually haven't driven the car yet.. just bought while I'm still in Iraq but I'll find out on the rebuild)





Plans to make the power:

Going to straight pipe the cats (yay no emissions!)

Holley intake / carb (with including mods i.e. fuel pump etc etc...)

If I decide to stay with 6 port... street port primary with a bridged auxilary and pineapple express sleeve inserts or whatever they're called.

Exhaust ports ported as well

If I go 4 port then half bridge

Make new cold air box for the carb'd unit

s6 rotors

Banzai-racing's rebuild kit with the s6 springs and whatnot





... not quite sure what else I'll need. Also would like to know if any 6 port guys have a similar setup and do your aux ports open? Or is there not enough back pressure and I'll have to do the electric modified ones?





Thanks in advance for helping me with my post deployment shopping list. :P
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Old 01-26-2011, 03:23 AM
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Making that much power is pretty much what you have there you get like 14 with just headders
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Old 01-26-2011, 03:32 AM
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Originally Posted by RicerJ View Post
Making that much power is pretty much what you have there you get like 14 with just headders


Well it's an s4... if I'm not mistaken it only made 146hp stock to the flywheel...



I'm looking for 170 to the wheels.
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Old 01-26-2011, 12:50 PM
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well if my dyno run was right i was making 192 on my s4 with hollowed cat and 2.25 single exhaust with full advanced timing on a streetported engine
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Old 01-26-2011, 02:34 PM
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just a proper street port is easy to get 180 to 190whp out of the 6 port motor, you can get alot more but you get into the side seal breaking point once over 200 or so. even with the stock intake manifold or a webber carb. not a fan of the holley carbs on rotas.
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Old 01-26-2011, 10:38 PM
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Few updates to what I've decided because of feedback from the 7club...



"s6 rotors" was a typo... meant s5 n/a

I'll be going with t2 housings and porting exhaust

Not going carb... sticking to EFI

RTEK

Make a cold air box for the CAI

port match UIM/LIM

Upgrading to t2 secondary injectors

Street port on the 6 port irons no bridge on aux port

TB mod is a maybe... but I've heard bad things about it.



More to follow... thanks for the help thus far.
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Old 01-27-2011, 01:53 AM
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My buddy had a nice running N/A back in the day,

Microtech ECU

Street Ported primaries and secondaries

Racing Beat Headers With Pre Silencer and Custom Catback

Cold Air Intake

FC1000 Ignition

Magnacore 10mm Wires



And he was around 175 RWHP but on S4 N/A rotors, you should be able to get your goal with S5 n/a rotors and rx8 stationary gears for high revs.

Have Fun
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Old 01-27-2011, 07:05 AM
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Rx8 stationaries, huh? I'll have to look into those.



Looks like if all he had was that I should be set! Appreciate it.
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Old 01-27-2011, 01:54 PM
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I forgot to say he had an aluminum flywheel.

you need to silicone the rx8 stats but its worth it and if you want to squeeze every last bit of power get an rx8 e-shaft i think its like .5 lb lighter have your S5 rotors balanced with the rx-8 shaft which is cheap(like $178 from mazdatrix) aluminum flywheel and a little shot of nitrous like a 75 shot and you will have one nasty little car.





I love N/A's and i love power thats why i now run an LT1 engine in my 86 soon to be LS1 again.
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Old 01-27-2011, 10:36 PM
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Yeah but how reliable is "ghetto rigging" the stationary?
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