Headers for V8 cars, Please read
Lexus Champion
Joined: Feb 2001
Posts: 3,124
Likes: 32
From: Texas
Originally Posted by Ag02M5
That is great this thing went through.
jbrady...do you think your guy would want to tackle an M5 header next? I'm pretty sure I could get the same level of commmitment. Our headers run about 3 grand!!
Can't wait to see a dyno!
Cheers.
Ryan
jbrady...do you think your guy would want to tackle an M5 header next? I'm pretty sure I could get the same level of commmitment. Our headers run about 3 grand!!
Can't wait to see a dyno!
Cheers.
Ryan
Are you the same Ryan that came out to HRP with your GS400? If so, you now have an 02 M5? Sweet.
Can you get a set of stock manifolds and heat shields? Maybe from someone that went with the $3k parts would have available. If so, I would definitely get something going. I have seen the stock M5 manifolds and while not as horrible as the Lexus parts there is still room for improvement. Send me a PM.
John Brady
Originally Posted by jbrady
In addition to the generosity of the above members additional thanks is due to DaveGS4 for not only getting this project approved with CL but also staying supportive the entire time AND for his latest help he has sponsored gawd's next dyno session!!!
Big thanks Dave
Big thanks Dave
Gotta thank Dave (DAVEGS4)and the other contributors for helping out in the project. I really appreciate the gesture and money
I've set up the dyno day for Monday, so we should have some numbers later that afternoon. If anyone in Houston wants to tag along or get a baseline dyno, please PM me.
Lexus Champion
Joined: Feb 2001
Posts: 3,124
Likes: 32
From: Texas
gawd just told me the car just gets faster everyday! 
Even in 99 degree Houston humidity the car is snapping his head like it was ice cold outside. He did a pull as we spoke and the sound of his SRT ripping through the revs sounds GREAT
He may be able to record some sounds for those interested.
He reports the power starts at only 2600rpm
This is EXACTLY what we wanted. Great power, Great torque, no extra noise.
He says it pulls very hard up to 5800 and then the power levels out to the 6200rpm shift point. Now, it is probable that the power stays even from 5800 to 6200 and is not gaining as fast as from 2600 to 5800. Still, the butt-dyno is not a quantative tool. BUT the feel of the pants improvement is seriously good stuff. I am jealous I can't get this for at least a month
Looks like the dyno is on for Monday.
Even in 99 degree Houston humidity the car is snapping his head like it was ice cold outside. He did a pull as we spoke and the sound of his SRT ripping through the revs sounds GREAT
He may be able to record some sounds for those interested.
He reports the power starts at only 2600rpm
This is EXACTLY what we wanted. Great power, Great torque, no extra noise.
He says it pulls very hard up to 5800 and then the power levels out to the 6200rpm shift point. Now, it is probable that the power stays even from 5800 to 6200 and is not gaining as fast as from 2600 to 5800. Still, the butt-dyno is not a quantative tool. BUT the feel of the pants improvement is seriously good stuff. I am jealous I can't get this for at least a month
Looks like the dyno is on for Monday.
EV ftw!!!
Joined: Nov 2002
Posts: 8,947
Likes: 546
From: Lake Ontario
Originally Posted by jbrady
gawd just told me the car just gets faster everyday!
Even in 99 degree Houston humidity the car is snapping his head like it was ice cold outside. He did a pull as we spoke and the sound of his SRT ripping through the revs sounds GREAT
He may be able to record some sounds for those interested.
He reports the power starts at only 2600rpm
This is EXACTLY what we wanted. Great power, Great torque, no extra noise.
He says it pulls very hard up to 5800 and then the power levels out to the 6200rpm shift point. Now, it is probable that the power stays even from 5800 to 6200 and is not gaining as fast as from 2600 to 5800. Still, the butt-dyno is not a quantative tool. BUT the feel of the pants improvement is seriously good stuff. I am jealous I can't get this for at least a month
Looks like the dyno is on for Monday.
Even in 99 degree Houston humidity the car is snapping his head like it was ice cold outside. He did a pull as we spoke and the sound of his SRT ripping through the revs sounds GREAT
He may be able to record some sounds for those interested.
He reports the power starts at only 2600rpm
This is EXACTLY what we wanted. Great power, Great torque, no extra noise.
He says it pulls very hard up to 5800 and then the power levels out to the 6200rpm shift point. Now, it is probable that the power stays even from 5800 to 6200 and is not gaining as fast as from 2600 to 5800. Still, the butt-dyno is not a quantative tool. BUT the feel of the pants improvement is seriously good stuff. I am jealous I can't get this for at least a month
Looks like the dyno is on for Monday.
Lexus Champion
Joined: Nov 2003
Posts: 1,691
Likes: 0
From: St. Petersburg, Florida
Originally Posted by jbrady
He reports the power starts at only 2600rpm
Lexus Champion
Joined: Feb 2001
Posts: 3,124
Likes: 32
From: Texas
Originally Posted by bmgs400
Sounds like a perfect match for my future Dragon TC upgrade...should really fly on launch with 3.76 LSD and wide meat.
Actually, if I had traction the night I ran 14.22 at 99mph I would have definitely gone high 13s. This was done on a stock 99 LS400 with a modified stock airbox at a raceweight of 4000lbs.
3.77 LSD and it would have been around 13.7.
TC plus drag radials 13.2.
Headers and exhaust with above POSSIBLY 12.9s.
A GS400 should be able to run 2 tenths quicker than my LS400 all else equal.
A 100hp shot of NOS and we would be threatening 11s.
Lexus Champion
Joined: Feb 2001
Posts: 3,124
Likes: 32
From: Texas
Originally Posted by Fisher503
Any GS430 guys plan on installing this soon?
Again, I see these helping the 430s even more than the 400s due to the larger engine and worse stock manifolds.
Lexus Champion
Joined: Nov 2003
Posts: 1,691
Likes: 0
From: St. Petersburg, Florida
Originally Posted by jbrady
You bet
Actually, if I had traction the night I ran 14.22 at 99mph I would have definitely gone high 13s. This was done on a stock 99 LS400 with a modified stock airbox at a raceweight of 4000lbs.
3.77 LSD and it would have been around 13.7.
TC plus drag radials 13.2.
Headers and exhaust with above POSSIBLY 12.9s.
A GS400 should be able to run 2 tenths quicker than my LS400 all else equal.
A 100hp shot of NOS and we would be threatening 11s.
Actually, if I had traction the night I ran 14.22 at 99mph I would have definitely gone high 13s. This was done on a stock 99 LS400 with a modified stock airbox at a raceweight of 4000lbs.
3.77 LSD and it would have been around 13.7.
TC plus drag radials 13.2.
Headers and exhaust with above POSSIBLY 12.9s.
A GS400 should be able to run 2 tenths quicker than my LS400 all else equal.
A 100hp shot of NOS and we would be threatening 11s.
Can't wait to check gawd's dyno results this coming Monday.
