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Old 01-05-2014, 04:08 PM   #1
LedfootLarry
 
Drives: 2003 corvette Z06
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!02mm TB on TVS 2300

I have a tvs 2300 on a 402, in a 2003 Z06 vette. It has a fairly large cam ,
243 247 623 623 , 114LS.
I have cathedral heads, afr 245`s.
I just finished install on a 3" exhaust.
I am running an 8 rib with 8" overdrive harmonic, 3.3" snout pulley, and overdrive cog drive.
It is achieving 13lbs boost , and dyno`ed around 650/650.
I am running a 90mm tpis TB now, and want to pulley down to a 2.9",
How much more will I get out of it with a 102mm TB ? Because the 102 as you know wil set me back $1000. all said and done. I had to come to the Camaro side, as hardly any vettes max these set-ups out TIA....Larry
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Old 01-05-2014, 04:15 PM   #2
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Quote:
Originally Posted by LedfootLarry View Post
I have a tvs 2300 on a 402, in a 2003 Z06 vette. It has a fairly large cam ,
243 247 623 623 , 114LS.
I have cathedral heads, afr 245`s.
I just finished install on a 3" exhaust.
I am running an 8 rib with 8" overdrive harmonic, 3.3" snout pulley, and overdrive cog drive.
It is achieving 13lbs boost , and dyno`ed around 650/650.
I am running a 90mm tpis TB now, and want to pulley down to a 2.9",
How much more will I get out of it with a 102mm TB ? Because the 102 as you know wil set me back $1000. all said and done. I had to come to the Camaro side, as hardly any vettes max these set-ups out TIA....Larry
I think I saw about 28 rwhp from my 102. Typical gains are in the 20-30 rwhp with ported inlet.
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Old 01-05-2014, 05:51 PM   #3
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At your power level I would say about 40. And you get get the tb much less than $1000.Awesome heads by the way who recommended those with a Maggie?
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Old 01-06-2014, 08:09 PM   #4
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Quote:
Originally Posted by LedfootLarry View Post
I have a tvs 2300 on a 402, in a 2003 Z06 vette. It has a fairly large cam ,
243 247 623 623 , 114LS.
I have cathedral heads, afr 245`s.
I just finished install on a 3" exhaust.
I am running an 8 rib with 8" overdrive harmonic, 3.3" snout pulley, and overdrive cog drive.
It is achieving 13lbs boost , and dyno`ed around 650/650.
I am running a 90mm tpis TB now, and want to pulley down to a 2.9",
How much more will I get out of it with a 102mm TB ? Because the 102 as you know wil set me back $1000. all said and done. I had to come to the Camaro side, as hardly any vettes max these set-ups out TIA....Larry
At about 750 whp a stock LSA throttle body becomes a major restriction. Your 90 is a little bigger. No matter how you mix it, with similar AFR's you need a certain amout of air to make a certain amount of horsepower. The throttle body is one of those items that until it actually becomes a restriction bigger is not necessarily better, for example if 3 cars are racing down a highway that has 3 lanes they will be just as fast as a highway that has 5 lanes. Only when the road is a restriction, less lanes than cars, will it have a major effect on traffic. You may see a few horses by swapping the throttle body at 650 whp but in my opinion you need another 50 whp before it will make much difference. I don't think it is worth the price at this point.
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Old 01-06-2014, 08:21 PM   #5
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Quote:
Originally Posted by LedfootLarry View Post
I have a tvs 2300 on a 402, in a 2003 Z06 vette. It has a fairly large cam ,
243 247 623 623 , 114LS.
I have cathedral heads, afr 245`s.
I just finished install on a 3" exhaust.
I am running an 8 rib with 8" overdrive harmonic, 3.3" snout pulley, and overdrive cog drive.
It is achieving 13lbs boost , and dyno`ed around 650/650.
I am running a 90mm tpis TB now, and want to pulley down to a 2.9",
How much more will I get out of it with a 102mm TB ? Because the 102 as you know wil set me back $1000. all said and done. I had to come to the Camaro side, as hardly any vettes max these set-ups out TIA....Larry
Are you in Ontario, California or the cold one up north? If you are in California, call Ryne or Mike @ Cunningham Motorsports (951) 677-0716 or if you're in Canada, shoot them an e-mail (best way to get in touch with them either way) at sales@cunningham-motorsports.com. They will get you all the info you need and not steer you in the wrong direction.

You can check out their website to see some of what they do. http://www.cunningham-motorsports.com/

Good luck
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Old 01-06-2014, 08:34 PM   #6
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Originally Posted by jessrayo View Post
At about 750 whp a stock LSA throttle body becomes a major restriction. Your 90 is a little bigger. No matter how you mix it, with similar AFR's you need a certain amout of air to make a certain amount of horsepower. The throttle body is one of those items that until it actually becomes a restriction bigger is not necessarily better, for example if 3 cars are racing down a highway that has 3 lanes they will be just as fast as a highway that has 5 lanes. Only when the road is a restriction, less lanes than cars, will it have a major effect on traffic. You may see a few horses by swapping the throttle body at 650 whp but in my opinion you need another 50 whp before it will make much difference. I don't think it is worth the price at this point.
At less than $600 and a gain of 35hp-40hp it will be the cheapest HP he can get
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Old 01-06-2014, 09:09 PM   #7
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At less than $600 and a gain of 35hp-40hp it will be the cheapest HP he can get
Mine cost $1000 and I don't think it will give him more than 20 whp because I don't think the 90 is a restriction at all at 650 whp. Plus the car does not idle as nice with the 102. Just my opinion, but my build is pretty similar to his...
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Old 01-06-2014, 09:16 PM   #8
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Mine cost $1000 and I don't think it will give him more than 20 whp because I don't think the 90 is a restriction at all at 650 whp. Plus the car does not idle as nice with the 102. Just my opinion, but my build is pretty similar to his...
I have done a ton of Maggie builds and never seen less than 25rwhp and that's 550rwhp cars .The 90 is always a restriction in my testing.We have perfect idle as well that may be in your tune and a 102 can be had for less than $600
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Old 01-06-2014, 11:12 PM   #9
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I'm making 16.5psi on a 2.95" pulley, without a 102mm throttle body. I also have ported heads, 2" headers, big cam, etc. You will be limited by belt slip before the throttle body.
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Old 01-06-2014, 11:19 PM   #10
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I'm making 16.5psi on a 2.95" pulley, without a 102mm throttle body. I also have ported heads, 2" headers, big cam, etc. You will be limited by belt slip before the throttle body.
So you don't think your car would pick up with a 102?
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Old 01-06-2014, 11:22 PM   #11
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whats the most you can port your stock tb for the maggie?
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Old 01-06-2014, 11:23 PM   #12
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whats the most you can port your stock tb for the maggie?
Not enuff to do much of anything...The snout will go to 107 pretty easy
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Old 01-06-2014, 11:43 PM   #13
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Not enuff to do much of anything...The snout will go to 107 pretty easy
i see so then you would need a 102 tb dam that gets more expensive lol..
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Old 01-06-2014, 11:45 PM   #14
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i see so then you would need a 102 tb dam that gets more expensive lol..
It never ends LOL..It would be the cheapest HP youll get and it lowers your IATs
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Old 01-07-2014, 11:46 AM   #15
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My car would pick up with it yes, I have a 102mm sitting on my bench. I don't think your setup will benefit as greatly from it, as you're not moving as much air. I would sooner spend the money on a phenolic spacer for the Maggie.
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Old 01-07-2014, 11:50 AM   #16
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leftcoast32 makes a 102mm snout.
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Old 01-07-2014, 12:26 PM   #17
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leftcoast32 makes a 102mm snout.
I don't see the benefit of that,very nice but a lot of cash and the stock snout goes up to 107 with no problem
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Old 01-07-2014, 01:19 PM   #18
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Yeah, a simple boring procedure on the stock Maggie snout for $50 seems a lot cheaper than a whole new snout.
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Old 01-07-2014, 07:39 PM   #19
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Well , the AFR heads and everything else was spec`ed by myself, except the cam, which was spec`ed by the builder, Billy Briggs. This engine was built to run to 7500 rpm through the traps in the 1/2 mile[saves a gear change]. I have run it to the limiter[7300], and disintegrated the cog belt. Joe at leftcoast 32 said it was because of the "violent on-off" hitting the limiter, so no more of that.
I am changing things up this year, I just added full 3" exhaust, and I am just going to start looking at building a new air intake.[not many avail for my Maggie vette] I will probably go ahead with a tpis 102, as this has the correct throttle opening for it, as compared to the NW 102 . As I mentioned I will pully down to a 3" or 2.9" from my 3.3" , and would like to remove the MAF, and go SD tune.
Here is a pic of the engine bay..............

And I am in the COLD Ontario unfortunately
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Old 01-07-2014, 07:43 PM   #20
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Well , the AFR heads and everything else was spec`ed by myself, except the cam, which was spec`ed by the builder, Billy Briggs. This engine was built to run to 7500 rpm through the traps in the 1/2 mile[saves a gear change]. I have run it to the limiter[7300], and disintegrated the cog belt. Joe at leftcoast 32 said it was because of the "violent on-off" hitting the limiter, so no more of that.
I am changing things up this year, I just added full 3" exhaust, and I am just going to start looking at building a new air intake.[not many avail for my Maggie vette] I will probably go ahead with a tpis 102, as this has the correct throttle opening for it, as compared to the NW 102 . As I mentioned I will pully down to a 3" or 2.9" from my 3.3" , and would like to remove the MAF, and go SD tune.
Here is a pic of the engine bay..............

And I am in the COLD Ontario unfortunately
don't understand why the NW 102 wouldn't work
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Old 01-07-2014, 08:07 PM   #21
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The actuator motors are on opposite sides for one, the way the throttle blades flip open are opposite to each other also, although that can be changed, for my setup --TPIS
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Old 01-07-2014, 08:16 PM   #22
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leftcoast32 makes a 102mm snout.
That is impressive HP with a 2.3
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Old 01-07-2014, 08:39 PM   #23
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there are other options that give substantial results for less based of just cubes alone.
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Old 01-07-2014, 09:26 PM   #24
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We actually tested a NW 102mm throttle body verses a stock 87mm throttle body on a 2013 CTSV last year, this particular combination was an auto and on the dyno put out 635 rwhp, when we opened the snout inlet and switched to the 102mm throttle body, it jumped up to 670 rwhp, also gained about 1.5 psi.
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Old 01-08-2014, 01:21 PM   #25
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Well Larry, if you do put it on please get back on here and tell us what you think. I did not change my throttle body by itself, I swapped superchargers and didn't have much gain until I swapped out the throttle body, then it went from around 765 to 807 so I gained about 42 with the throttle body but my car made 756 on the 1.9 stock blower with the stock throttle body.
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