S/C Questions...

[justinschmidt1]

You don't need a meth kit, intercooler, or 700 octane gas to run a blower. If you want a blower, keep the boost to 10 psi or less and have fun.

And everyone should have a good tune... I never understand that phrase "you'll need a good tune" is there some cheap crappy tune you can normally get by with?

lol.....yes, theres a dude I know around here that had his car tuned....the car left the shop with like 12.5-13 a/f ratio somehow, on 12 psi...needless to say the motor was done very soon after.

Im not really sure what they were doing

 

[Jrgunn5150]

I bet it wasn't any cheaper than a competent tune. Just because someone rents a stall and hands out business cards doesn't make them qualified is the lesson there, or don't let any random fool work on your car.

Somehow I managed not to blow my own motor with 10 psi, 10.3:1 c/r, and crappy 91 octane cali standard gas, in the desert, without an intercooler. It's not super hard.

 

[simplyme0484]

I know for sure that I want to get the long tubes, but will I be able to use the larger plenum and all the others listed with the s/c? I don't want to have to "retune" over and over after getting different parts and setups. What would be a good cam to go with, also about how much does a p/p run for these heads?

Brenton

People seem to forget that the dumb bolt on's do help out. It's not going to give you no 50 rwhp gains but it complement everything thing else that U put on. Its not the same running a SC with stock throttle & plenum than with a 75mm and 100cm flowing plenum. Plus, since U did the PI swap, the car need to breath air like crazy with the high compression. Anyways :blah2:

With the cams, unless U get the heads ported, it won't be much of an increase with bigger cams, but if ported the 270h or the 274ah are awesome combos w/ported heads. P/P heads vary from shop 2 shop, It can go from $700-$1200 from what I've seen. With the tunning, get all the parts mounted first and then get the tune. And YES you can use all the bolt on's including the 75 throttle with a SC.

If you're going FI, go with the D1SC (IF YOU INDEED HAVE FORGED INTERNAL). Go check out RPMoutlet.com, they have the ProCharger kit with the intercooler, tunner, injector and fuel pump for $4400 im pretty sure.

Hope this helps..... :thumb:

PS: check if indeed you have the PI stuff, cause I think the guys are right about the IM

 

[97aztecgt]

First get some new motor mounts, Your right side is broke.

And not to sound like an a$$, and Im not going to say you dont have all that done to your car and all....cant prove that... But you said you have PI heads and intake. That is clearly a NPI intake. The runner on a PI intake where the bolt goes through the plenum runs to the right side (pass side) and the NPI runs to the left (driver side).

As I stated, I just got the car last Friday and I'm going by what he said, so I really have no clue what it really has. I came into this car knowing nothing at all. I know for sure that it runs like a bat out of hell, it's way faster than any other GT I've drove. I've heard that these plastic intakes explode sometimes, so I guess it should be replaced anyway with a much nicer one. Also, how can you tell by the picture that the motor mount is broke? I'm not getting a harsh jump when I get on the throttle, like when most motor mounts are broke.

I want to keep the boost on a conservative level being this is my DD and the last thing I need is the car giving out on me. lol

I'm going to try to get to a track to see what it will do.

Brenton

 

[justinschmidt1]

I know for sure that I want to get the long tubes, but will I be able to use the larger plenum and all the others listed with the s/c? I don't want to have to "retune" over and over after getting different parts and setups. What would be a good cam to go with, also about how much does a p/p run for these heads?

Brenton

People seem to forget that the dumb bolt on's do help out. It's not going to give you no 50 rwhp gains but it complement everything thing else that U put on. Its not the same running a SC with stock throttle & plenum than with a 75mm and 100cm flowing plenum. Plus, since U did the PI swap, the car need to breath air like crazy with the high compression. Anyways :blah2:

With the cams, unless U get the heads ported, it won't be much of an increase with bigger cams, but if ported the 270h or the 274ah are awesome combos w/ported heads. P/P heads vary from shop 2 shop, It can go from $700-$1200 from what I've seen. With the tunning, get all the parts mounted first and then get the tune. And YES you can use all the bolt on's including the 75 throttle with a SC.

If you're going FI, go with the D1SC (IF YOU INDEED HAVE FORGED INTERNAL). Go check out RPMoutlet.com, they have the ProCharger kit with the intercooler, tunner, injector and fuel pump for $4400 im pretty sure.

Hope this helps..... :thumb:

PS: check if indeed you have the PI stuff, cause I think the guys are right about the IM

Nobody is forgetting...Im just saying that Ive been that route...Ive got like every bolt on made for our cars....instead of spending thousands of dollars on bolt ons, spend thousands of dollars on a blower an actually make power.

He could always go back and buy bolt ons....but my point is, if he is forged, there is no point.

He will be making more than enough power for him to car about picking up 7 HP with a larger TB(which seems to destroy the feel off the throttle)

Long tubes would be a good mod but other than that I wouldnt reccomend anything.

 

[97aztecgt]

I just called about getting the heads ported, they guy kept saying gasket matching or something. But he said it would be about $400 to "gasket match/port" both heads. I've heard about porting heads for quite some time now, but what are they actually doing when they do this? What kind of numbers should I be looking at, no hp/tq numbers but what ever needs to be ported, to be ported to the correct diameter or w/e?

Brenton

 

[chrisjb521]

I read that u wanted a kenne bell...ur right they don't have them avaliable for 96-98 cars but u have pi heads....so u can run the blower for the 99-up cars

 

[MustangChris]

what kind of pistons did you put in? thats the key in your motor. with your list of mods.

if you did not change the piston dimentions, but simply got forged ones, (IE, they are exactly like stock, except they are forged, not made to change compression) you SHOULD run premium. Your compression ratio with PI Heads is now 10:1. Unless you shaved your heads before having them put on. If you had your heads shaved, your compression ratio is HIGHER than 10:1 and you would STILL need premium.

As for a supercharger:


(im writing this post for everyone 96-98, not just the topic starter) also keep in mind this is on pump gas, not race gas. I use the term "premium" for the highest octain you can buy at your location. its 91 here in colorado, 93 lower altitude and on the east coast (FL) ive seen 100+ at multiple stations.

For those who want to do minimal engine work (such as not doing the PI head swap.) Our compression ratio is 9:1. This allows for more boost. The problem is the intake ports can become restrictive. The largest I've heard suggested for stock NPI heads is 14 PSI. This starts to max out the heads. This is suggested mostly for track, run a 8-10PSI on the street. I suggest using a centrifical supercharger (procharger/vortech.)

For those who want to do the PI head Swap, but nothing else. I suggest using a Vortech/procharger. 6-8 PSI street, 8-12 track. The PI heads will RAISE your compression Ratio to 10:1, which is pretty high. I do not suggest having the heads shaved, it will only complicate things for minimal benifits.

For those who want to kick some ass and take some names: I suggest pulling the motor. Rebuilding and forging the lower end with low-compression pistons. Port and polish(optional) P.I. heads (once again, i do not suggest shaving them, but this is the only time i wouldn't yell at you because you can have your pistons customized if needed, and you have a forged lower end.) With a forged lower end, ported heads, and the motor out of the car, i suggest a Kenne Bell SuperCharger. THIS REQUIRES YOU (on 96-98 GTs) TO REMOVE THE RETURN EFI FUEL SYSTEM AND REPLACE IT WITH THE 99-04 NON RETURN LINE EFI FUEL SYSTEM. This is a premium time to upgrade the fuel pump, fuel lines, fuel rails, and fuel injectors as you get rid of that return system.

after your motor is built, i suggest 10-15 PSI for street and 20+ for the track.

A few things to remember: Kenne bell makes 2 kits. the largest is the 2.8L blowzilla. This requires a new hood. stock 94-98 hoods will not fit this (nor will stock strut bars)

the 2.1 is the most common, but is not recomended for boosts higher than 20. Blowzilla takes it further, i believe up to 26? ( i forget the exact boost numbers) the blowzilla is good for 800+ HP.

Kenne Bells are self oiling, buy extra oil with your supercharger, keep it in your car in case of emergencies.

do not port you KB. They are not as common as eatons (03/04 cobra blowers) and you should not trust anyone to port a KB.

KBs come with intercooler kits too, just like centrifical superchargers.


A few more overall notes:

All of these set ups, listed above, require you to move from mid-grade to premium fuel.

TUNE YOUR CAR. (Profesionally might be a good idea) Running rich washes the oil off you cylinder walls, which is terrible, but the problems are only amplified with boost/high compression. And we all know the problems of running lean, because we've all seen that turbo honda bearly running down the road... "i got 15 PSI, WTF???!" :hammer: Also, when you are getting your car tuned YOU CAN TALK TO THE TUNER. My numbers on this forum are ball-park based off the 10000 times ive read kenne bell's webpage and procharger's web page. If you are at sea level, with 103 octain readily available, your tune (and amount of boost) could change than us greenies up here in colorado with 91.

I do not suggest shaving your heads. the added compression can be compensated with higher boost without complications, or extra funds.


remember, if you want a KB on your 96-98, you need to change the fuel system from return EFI to returnless EFI. If you keep the stock return EFI and get a different supercharger (like procharger) i suggest running a fuel cooler, Jegs=$100.00.