HELP!!! i need all the input i can get..

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rw98gt

New Member

Jun 26, 2006

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peabody, ma

Mar 3, 2008

#1

• Mar 3, 2008

• #1

here is my delema, i have a 98gt w/aode with some modds. i am currently getting ready to install pi heads & intake w/comp cams XE270AH & comp cams valve springs PN26113. i am having the heads ported, i am trying to match the article i read FILLING THE GLASS in 5.0 mag. from my august issue. i am worried about my transmition, i have read on some of these forums that a lot of you guys have built trannies. i need as much input as possible (how much $$, what company to go with, what parts to use or look for) to help me make my choise on what to do. if i play my cards right i'm hopping to run about 450hp to 500hp from the setup. i know that i should build up the block because 450hp is pushing it to the max, but it will have to wait till i get the extra $$ to do so. with some conservative tunning i hope to keep it between 400 - 450hp. i know that you guys are saying that i may be optomistic but from what i read this setup w/out the supercharger this combo dynoed in at just over 400hp and 390 lb-ft of torque on a basically stock motor. with the supercharger (vortech) it belted out 648hp and 545 lb-ft of torque. not to shabby.. the supercharger that i am running is a very cheap one (powerdyne) but it still works so this is how i am estamating my #'s. so please give me all the input positive or negative to help me out. thanks, ron

 

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rw98gt

New Member

Jun 26, 2006

68

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peabody, ma

Mar 4, 2008

#2

• Mar 4, 2008

• #2

WOW! this is a first, there is no one to give any advice.

 

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SilverBullet00

New Member

Jul 5, 2004

1,150

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Wichita, KS

Mar 4, 2008

#3

• Mar 4, 2008

• #3

If you want 400-450 HP you need the vortech now. If you could get 400HP N/A, a lot more people would do it.

 

SaleenGT2001

Well-Known Member

Jul 18, 2005

2,811

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58

Four Oaks NC

Mar 4, 2008

#4

• Mar 4, 2008

• #4

you are not being optimistic......................you are just plain crazy!!!

you will not come anywhere colse to 400 rwhp without a s/c or some spray.
maybe those numbers are not RWHP

 

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rw98gt

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Jun 26, 2006

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peabody, ma

Mar 4, 2008

#5

• Mar 4, 2008

• #5

this may be at the crank but with the setup i described it will exceed 400hp...

 

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rw98gt

New Member

Jun 26, 2006

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peabody, ma

Mar 4, 2008

#6

• Mar 4, 2008

• #6

the compression goes from 9.3:1 to 10.6:1 thats a big difference and a lot more hp then factor in the cams & on top of that a supercharger. how can you not see this there is much power to be had from this. maybe you should research it before calling me crazy...

 

SaleenGT2001

Well-Known Member

Jul 18, 2005

2,811

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58

Four Oaks NC

Mar 4, 2008

#7

• Mar 4, 2008

• #7

rw98gt said:

the compression goes from 9.3:1 to 10.6:1 thats a big difference and a lot more hp then factor in the cams & on top of that a supercharger. how can you not see this there is much power to be had from this. maybe you should research it before calling me crazy...

Click to expand...

maybe you should do a little more research..........high compression is not good for a s/c. we dont discuss flywheel HP here very often, we go by what the car acttually puts to the ground. if you want to talk flywheel hp my car made 450 at the flywheel on its last dyno, but that also means it only made 375 to the wheels.

so basically you are saying you want to put 320 rwhp down, right??? you should be able to do that with cams and a tiny s/c

 

scupking

Active Member

Sep 18, 2005

1,186

1

36

Enfield, CT

Mar 4, 2008

#8

• Mar 4, 2008

• #8

With the mods you listed you will be around 300 RWHP (that’s about 350 at the crank). Trust us, you will not see close to 400 without a super charger. People have more mods then you listed and are just a tick over 300 at the wheels.

 

navarro98gt

Member

May 15, 2003

213

3

16

chicago, IL

Mar 4, 2008

#9

• Mar 4, 2008

• #9

Look at my set up in my sig. and I'm just breaking the 300rwhp although it is through an automatic trans.

As far as running 10.5 compression and a supercharger on the stock bottom end......BOOM!!

 

SaleenGT2001

Well-Known Member

Jul 18, 2005

2,811

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Four Oaks NC

Mar 4, 2008

#10

• Mar 4, 2008

• #10

he's running an auto too

 

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rw98gt

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Jun 26, 2006

68

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peabody, ma

Mar 4, 2008

#11

• Mar 4, 2008

• #11

i posted this because i would like to know what to do to my tranny and any and all other input good or bad. the artical that i read was done on an engine dyno maybe i should of stated that i know that these #'s won't bo to the wheels but i do know w/out building the bolck it will handle 400 - 450 hp i think that is measured in crank hp isn't it ,not to the wheels or you are right BOOM!
i'm not looking for that to happen i also know that high compression on a stock block isn't the best thing but w/my LITTLE 6lb. supercharger i'm sure it won't blow up. as long as i tune it properly. so i'm not some kid who thinks you bolt on a throttle body you gain 20hp on a stock motor i have some knowledge of how some things work. i just have to be more specific with what i'm looking to do. sorry for the confusion..

 

SaleenGT2001

Well-Known Member

Jul 18, 2005

2,811

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58

Four Oaks NC

Mar 4, 2008

#12

• Mar 4, 2008

• #12

your trans will be fine with under 400 rwhp. you may want to add a trans cooler if you havent done so yet

 

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rw98gt

New Member

Jun 26, 2006

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peabody, ma

Mar 4, 2008

#13

• Mar 4, 2008

• #13

so you wouldn't sugest a shift kit or a more built trans? i will add a trans cooler thats a great idea. is 400hp the rear wheel hp or crank hp??? i can never remember.. thanks..

 

SaleenGT2001

Well-Known Member

Jul 18, 2005

2,811

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58

Four Oaks NC

Mar 4, 2008

#14

• Mar 4, 2008

• #14

400 rwhp is the so called "safe" range

you shouldnt need anything done to the trans. i shift kit wouldnt hurt though

 

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rw98gt

New Member

Jun 26, 2006

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peabody, ma

Mar 4, 2008

#15

• Mar 4, 2008

• #15

i had replaced a rear seal in the trans last year, i thought it was from the slight power increase i know that its putting just over 300torque to the wheels, i had it dynoed (not thats a lot ) but shortly after i put the supercharger in then this happened. so i have been thinking that the tranny would not hold up. if this is the case i will install a shift kit with a trans cooler.

 

04YELLOWGT

Active Member

Jun 29, 2005

1,135

2

39

Indiana

Mar 4, 2008

#16

• Mar 4, 2008

• #16

One thing you need to realize is that Magazine numbers are always higher than what we will get at the crank or the wheels. They will pick up 20rwhp with an intake where everyone else will gain 5rwhp. The numbers are inflated because companies pay to have their product “tested” and the Magazine is going to make sure that they make power with that product.

 

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rw98gt

New Member

Jun 26, 2006

68

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0

peabody, ma

Mar 4, 2008

#17

• Mar 4, 2008

• #17

so, 07 yellow gt what do you think that the motor will make with these modds?
what did you do to beef up your transmitiom? thanks, ron

 

04YELLOWGT

Active Member

Jun 29, 2005

1,135

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39

Indiana

Mar 4, 2008

#18

• Mar 4, 2008

• #18

Are you talking with or without a blower?

Well without a blower with ported heads and cams and PI intake depending on what other bolt-ons you have 280-290rwhp. Hotmustang had full exhaust, every bolt-on imaginable and heads and cams and was only making a little over 300 if I remember right through a 5spd. Yes you‘ll have higher compression but that advantage goes away with your auto.

For my transmission I did a full rebuild, clutches, bands, shift kit, ect. I’m not exactly sure of everything they did but I know they said it would be good for 1000hp. I also did a HD tranny cooler and PI stall.

My trans was going out on me so I figured might as well just upgrade everything. The trans was 100% bone stock before this.