people using GTP heads,please read
Originally Posted by maddboost
Money better spent else where? Ask any serious engine builder that heads is where your power is made their is no such thing as spending too much on heads. As far as dyno numbers alot of people compare peak numbers what about under the curve?
Far too often people claim things are overpriced when in fact they simply cant afford something of that quality level and would rather bash it or try to compare a less expensive product to it. Im not saying everything that costs more is better but a good majority of higher priced items are superior to their low buck competitiors.
Far too often people claim things are overpriced when in fact they simply cant afford something of that quality level and would rather bash it or try to compare a less expensive product to it. Im not saying everything that costs more is better but a good majority of higher priced items are superior to their low buck competitiors.
Thread Starter
Launching!
Joined: Oct 2003
Posts: 283
Likes: 0
From: texas
this topic is turned from what kinda #s GTPs are putting down and what kinda track times to other heads are better because they are cheaper. i was looking for insite on power related #s, not a comparison. and for your info, GTP is working to put out some budget heads also. if that makes me narrow minded, so be it.
Craig over @ GTP knows his stuff. You can't go wrong with a set of his cylinder heads. His dual valve spring packages are more expensive due to the springs he uses. I don't know of anyone using the Comp Cams Pro-Pac springs. They are used in Nascar and pro-forms of racing. His knowledge is 2nd to none.
Phillip
Phillip
I know you keep asking for GTP times/dyno, but have you given any thought to MTI's heads ? If I was going to do H/C that's the first place I would look at.
http://www.motorsporttech.com/fbody_engine01.asp
http://www.motorsporttech.com/fbody_engine01.asp
Originally Posted by monkeyboy
and for your info, GTP is working to put out some budget heads also. if that makes me narrow minded, so be it.
Thread Starter
Launching!
Joined: Oct 2003
Posts: 283
Likes: 0
From: texas
MTI would be nice to have and have been one of the leading heads at tracks. that was another choice of mine. main reason i chose GTP was because craig actually spent some time on the phone with me discussing what my plans were and what i want out of my car. trust me, i did call other speed shops but the first thing that flew outta theirs mouths were " we flow Xcfm ,our heads are reasonbly priced and outflow the competition". never did they ask "what do you want your car to do?"
Launching!
Joined: Nov 2001
Posts: 289
Likes: 0
From: Dallas, Tx
I have had three specific cases where I have used GTP heads.
Around 1994 or so, I ordered some of his heads for my Lt1...because of what I had heard about his work. With a Comp 306 cam, I ran 11.5 @ 120 mph all motor, stock shortblock...with a 6spd. For a long period of time, I had the fastest stock shortblock Lt1 around on motor.
Fast forward to 2000...I get a 2000 SS that I do the basic bolt-ons too. I called Craig up again, and told him I wanted some serious Ls1 heads that flowed...and a cam to match. He sent me a set of his worked over 4.8's, and a tiny for now 226 cam. TWO WEEKS LATER, on the 2nd trip to the track...I ran a 10.9 @ 123.50 mph...running the FIRST 10 SEC PASS for a stock shortblock A4, on motor!!!
3 weeks ago, we put together another car in the shop...basic rebuilt 346, GTP 4.8 heads again, and a custom AMS cam. The car made 450 rwhp through an unlocked convertor, and ran a 9.7 @ 139 mph FIRST TIME AT THE TRACK! with a single 150 shot. It was the fastest F-body at the GMHTP shootout here at Ennis.
If thats not a track record for his heads, I don't know what is
Chris
AMS RACING
Around 1994 or so, I ordered some of his heads for my Lt1...because of what I had heard about his work. With a Comp 306 cam, I ran 11.5 @ 120 mph all motor, stock shortblock...with a 6spd. For a long period of time, I had the fastest stock shortblock Lt1 around on motor.
Fast forward to 2000...I get a 2000 SS that I do the basic bolt-ons too. I called Craig up again, and told him I wanted some serious Ls1 heads that flowed...and a cam to match. He sent me a set of his worked over 4.8's, and a tiny for now 226 cam. TWO WEEKS LATER, on the 2nd trip to the track...I ran a 10.9 @ 123.50 mph...running the FIRST 10 SEC PASS for a stock shortblock A4, on motor!!!
3 weeks ago, we put together another car in the shop...basic rebuilt 346, GTP 4.8 heads again, and a custom AMS cam. The car made 450 rwhp through an unlocked convertor, and ran a 9.7 @ 139 mph FIRST TIME AT THE TRACK! with a single 150 shot. It was the fastest F-body at the GMHTP shootout here at Ennis.
If thats not a track record for his heads, I don't know what is
Chris
AMS RACING
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo
6600 rpm clutch dump of death Administrator
Joined: Dec 2001
Posts: 4,983
Likes: 13
From: Texas
Ok, we have a set of AS heads on the G5X3 car. They are the 2.75 heads. They seem to work real well.
With that said let me give you a little info on GTP. Craig is an all around good guy. He helped us in some racing that we are running which requires unported heads. Through his expertise in valve selection and valve angles Craig was able to pick us up 30cfm.
Sure, you don't see Craigs name all over the boards as he isn't out their pushing his product or hanging out on the boards. To say his flow work is outdated would be an incorrect statement. Craig has earned his stripes. Unless you have been over to Craigs shop and he told you he has stopped any further development work on the Ls1 program, I'd say you're totally off base.
Let me give you a real world example. Two cars with identical mods (224cam, headers and full bolt-ons). When they were dyno'd they had the exact same mods, and the dyno graphs would lay right on top of one another. In other words identical test conditions. One car had a set of vendor X's heads installed and the car dyno'd 414RWHP. The GTP heads were placed on the other car and dyno'd 440RWHP. BTW vendor X's heads flowed better than the GTPs from .050 to .500 the GTP pulled ahead at .550 and were ahead slightly for the rest of the test, but not by a huge margin.
Craig knew where and whernot to remove material, and his heads do the talking on both the dyno, and the track. Flow numbers are a god thing, They just aren't the only thing...
With that said let me give you a little info on GTP. Craig is an all around good guy. He helped us in some racing that we are running which requires unported heads. Through his expertise in valve selection and valve angles Craig was able to pick us up 30cfm.
Sure, you don't see Craigs name all over the boards as he isn't out their pushing his product or hanging out on the boards. To say his flow work is outdated would be an incorrect statement. Craig has earned his stripes. Unless you have been over to Craigs shop and he told you he has stopped any further development work on the Ls1 program, I'd say you're totally off base.
Let me give you a real world example. Two cars with identical mods (224cam, headers and full bolt-ons). When they were dyno'd they had the exact same mods, and the dyno graphs would lay right on top of one another. In other words identical test conditions. One car had a set of vendor X's heads installed and the car dyno'd 414RWHP. The GTP heads were placed on the other car and dyno'd 440RWHP. BTW vendor X's heads flowed better than the GTPs from .050 to .500 the GTP pulled ahead at .550 and were ahead slightly for the rest of the test, but not by a huge margin.
Craig knew where and whernot to remove material, and his heads do the talking on both the dyno, and the track. Flow numbers are a god thing, They just aren't the only thing...
I've got a set and love them. Just got them back actually from being freshed up.
I really never paid attention to flow #'s are even dyno #'s.. My car runs great and hope to run even better shortly..
I really never paid attention to flow #'s are even dyno #'s.. My car runs great and hope to run even better shortly..
9 Second Club
Joined: Nov 2001
Posts: 1,445
Likes: 0
From: Bay Area, CA
I think GTP makes a great product, but the price is too much... here is a dyno graph TR230 cam and absolute speed stage 2 heads.
I am quite happy with the results, I will note this was a strong cammed only car as it put down 426 rwhp, but the gain is nice 35 rwhp for just the heads.
I am quite happy with the results, I will note this was a strong cammed only car as it put down 426 rwhp, but the gain is nice 35 rwhp for just the heads.
Thread Starter
Launching!
Joined: Oct 2003
Posts: 283
Likes: 0
From: texas
what is considered too much? thats all i hear" GTPs are too much." why is it too much to pay on quality product with proven performance? why cant we just put the "cost issue" aside and focus on the topic. i know AS(along with other companies) has some great products, but at this time i want info on GTPs. i dont want come across as some rude dick, i am only interested in GTP info at this time. thank you, and nice #s by the way.
