Not fast enough

[Eskedal]

I have a 97 Gen 2 GTS

It works great but it is not fast enough.

Mods I have done:

Cat removed
3" catback
Heads ported with Serdi valve seats
027 head gasket head milled 020
Kn filter
Trend 3/8 pushrods
Stock 3,07 diff
Stock map

It have 420hp at the wheel now, before mods it had 385hp.

Any recommendations?

[plumcrazy]

yep....boost

[dave6666]

Decide on a budget and desired hp level and report back.

Wanna be the first one in Norway with a Roe?

[Fatboy 18]

Where do you need the speed?
All out top end or 1/4 mile drag racing?

[Fatboy 18]

Might want to look at Diff ratio's?
People say 355 gears make the car feel much faster?

[Eskedal]

There is one Rt10 here in Norway with Roe supercharger

[Eskedal]

@ Fatboy_18

I want more acceleration, I use my car only for street. Yes 3.55 will help

[Fatboy 18]

Could always add Nitrous for Boost

[plumcrazy]

nitrous is a blast. if you cant afford boost, go nitrous

[GTS Dean]

I have a 97 Gen 2 GTS


Stock map

It have 420hp at the wheel now, before mods it had 385hp.

Any recommendations?

What brand of dyno were these numbers produced on - Mustang?

A '97 on a Dynojet should lay down between 410-420 with only filters and smoothies. You'd benefit from a quality set of headers, HF cats and some roller rockers even with the stock JTEC. A tune would be even better. I would expect 460-470 from the whole combo. I guess it's possible that your Euro JTEC is more restrictive.

[Eskedal]

@GTS DEAN

Is not a dyno, I use a accelerometer. Have use it over 15 years on many many cars, it really works great.

With only kn filter I get 11hp
With 3" cat back and cat deleted only 9 hp
Heads ported and 027 gasket 21hp (stock valves) Yes intake valves is to small I know

426hp at the wheel is more correct. Is the difference I am looking for.

I have read many Us magazine/ internett, and every mods they do exemple a corvette c5 they gain everytime so much horsepower, much more than I can dream of.
Exemple My old C5, new Magnaflow rear exhaust every magazine say minimum gains 15 hp ++. I installed same exhaust system on my car and run it with my accelerometer and 0 hp was gained


Sorry for my english

[BK99GTS]

I'd suggest headers to complete your exhaust and take advantage of your ported heads. I have been very happy with my Belanger's.

[M5toViper]

Cam, gears, nitrous will have the biggest impact... And get some stickier tires

[GTS Dean]

@GTS DEAN

Is not a dyno, I use a accelerometer. Have use it over 15 years on many many cars, it really works great.

426hp at the wheel is more correct. Is the difference I am looking for.

From VA today:

[Spitfire481]

I make 475/520 on my own dynojet on 93 octane with intake, 5-1 headers, full 3" exhaust and tune. I have made pulls in winter and summer with very similar results. Tuning would have be very rich/no timing to be in the low 400's especially with shaved and ported heads

[dave6666]

There is one Rt10 here in Norway with Roe supercharger

You could be like him.

[RPM9000]

My 1995 Gen1 made 498 rwhp on Dyno Jet dyno, The mods were Greg Good ported heads, 708 cam, Gen 2 injectors, T&D roller rockers, Roe hi flow cats, Belanger headers and underdrive pulley.

[SlowPoke McGee]

My 1995 Gen1 made 498 rwhp on Dyno Jet dyno, The mods were Greg Good ported heads, 708 cam, Gen 2 injectors, T&D roller rockers, Roe hi flow cats, Belanger headers and underdrive pulley.

Those sound like decent numbers for a relatively mild upgrade package. Curious how many hp the underdrive pulley contributed. If 5-10hp as advertised, pretty damn cheap hp

[Darth Menace]

I can attest that 3.73's reallllllly liven this car up. It feels like a whole new best in acceleration and it makes 6th gear relatively usable.

[ACR-ISH]

yep....boost

+1 ^^^

[99RT10]

Check PMs.

[Fatboy 18]

Another thing to consider is how many miles you do per year. If you do a lot of touring then your fuel consumption costs will go through the roof with a Supercharger. if your car is just a weekend toy for blasting around on a Sunday morning then fitting a Supercharger will not be a problem.

[Sveina]

Headers, roller rockers 1,7:1 and tune. After that diff ratio and then No2 if still needed. Statens vegvesen in Norway would not be happy with a Roe under the bonnet

[ViperTim]

Are you gonna go track it?
Because that makes a big difference imo.

I haven't tracked a Viper with 3.73's, but here's my theory.

I'm running stock 3.07's and for a long time I wanted to change it. Then I tracked the car.
And the 3.07's is excellent at race track!
Why?
Because the car has so much torque, it barely matters what gear you're in. Less gear = less shifting = more concentration on braking & corner entrance and exit.
What makes you fast on a track? High acceleration and medium average speed or medium acceleration and high average speed?
Doesn't matter if you exit a corner at 2500rpm, the torque will help you anyways.

After the track I decided I wont change my 3.07's for anything.

[dave6666]

+1 ^^^

Nice used well modified and accessorized Roes can be had for well under $5k. Hp gains are amazing.