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front mount turbo v.s. rear mount turbo

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Old 03-17-2006 | 04:34 PM
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Originally Posted by y2khawk
The NHRA doesn't like them

4th revision down

http://nhra.com/apcm/templates/gener...le%20revisions
Wow.... ummmm does that mean that if I do build a 9 sec rear mount I cant compete in NHRA events?
Old 03-17-2006 | 05:35 PM
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Originally Posted by ajensen383
Hey Aaron....Well I know Cecil starts the first Saturday in March, but i doubt if they will run it unless the weather gets alot better, plus we wont have the car ready by then... We may take the "old" car down if they run, but not sure yet... Did you see the new Turbo car run or the older Naturally aspirated one?

He doesnt really have an official open house at the shop. Since its bascially just Andy and another full time guy at his shop,.. He is sooo busy building engines now, and when hes not at the shop, hes workin on the car....You are more than welecome to stop at the shop at any time though, he's good like that

Aaron and I saw Andy's turbo car run

I can only imagine how busy Andy is. I'm from Bloomsburg and everyone within 3 hrs of Andy's shop knows who Andy Jenson is.
Old 03-17-2006 | 05:37 PM
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Originally Posted by sb427f-car
I know, and I hate to bother yall when you're @ the track. I've followed the old car since oh, 01. I know they usually open cecil right around now, but they don't run a shootout until what, April? The shop is still up in Nesckopeck (sp?) right? I might have to chat with yall between rounds at some point as I will try my darnedest to make the first shootout this season. Plans on running faster than the .38 from last year?

Hey, also, by chance, you haven't happend across a darkblue ta with texas plates and a procharger in the last year or so in PA have you?
Trying to keep tabs on me Jr?
Old 03-18-2006 | 09:20 PM
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Originally Posted by DarkblueTA
Trying to keep tabs on me Jr?
All the time buba. HAHA
Old 03-30-2006 | 11:11 AM
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I've been pondering on getting one. I just don't have any room for a bottle.

both setups seem to be nice. I prefer the front mount honestly. But why is that if it has less parts involved, why is the front mount kits more money?
Old 03-30-2006 | 02:47 PM
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Originally Posted by wickedwarlock
I've been pondering on getting one. I just don't have any room for a bottle.

both setups seem to be nice. I prefer the front mount honestly. But why is that if it has less parts involved, why is the front mount kits more money?
Because the base-model STS kit is incomplete. No FMIC or BOV.
Old 03-30-2006 | 04:04 PM
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Originally Posted by Frost
Because the base-model STS kit is incomplete. No FMIC or BOV.
Its because it takes more fab work (headers and merge pipe)...
Old 04-02-2006 | 11:40 PM
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Originally Posted by JZ 97 SS 1500
Oh and one last tidbit..... Here is one of my customers and good pal....in....

OH NO, whats this.............. a PTK kit at the track. First time down the strip with his home tuning, 93 octane, full street trim...etc . This car would flat dust the cartek vette with race fuel, skinnies, and timing....lol. You see, our street cars run what the others Race cars run....lol

http://www.nick.neptune.com


Look out the window...you might see some green people walking around
Dust my car ? ? ? You have a lot of ***** talking sh*t about my car , you don't squat about my car , I never compared it to a PTK set up , and FYI , my car ran 9.88 on 93 octane , 9.33 on 100 octane , so what ? ? Nick has a ton of tuning time in his car and it runs good , stop trying to compare it to mine . Keep talking sh$t about my car a-hole , keep it up . Your a real good businessman talking down on other peoples cars that you've never seen in person , and helping to spread false accusations about me running nitrous , you're a real class act .

Last edited by STEALTH TURBO C5; 04-03-2006 at 12:21 AM.
Old 04-03-2006 | 12:14 AM
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And FWIW , my car is street driven 5000+miles per year , it was driven to and from the track , on drag radials and ran 9.33 . And in regards to the tune , Julio from Cartek has about 2 -3 hours total tuning time on my car , my car has never been logged going down the track , never been tuned at the track , that is going to change this year . Also , the compression is 9 to 1 . The converter is the same converter I ran the previous year when my car was NA , I think it's a 32-3400 stall . I've never bad mouthed any front mount turbo kits , I went with a rear mount because it was what I could afford at the time , and my car has proven they work , up to a certain level .
Old 04-03-2006 | 09:53 AM
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Talking ooooohhhhhhh!!!!!!!

Originally Posted by longrange4u
Wow.... ummmm does that mean that if I do build a 9 sec rear mount I cant compete in NHRA events?
9SEC NHRA
Old 04-03-2006 | 09:57 AM
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Talking I seen the vid

Originally Posted by STEALTH TURBO C5
And FWIW , my car is street driven 5000+miles per year , it was driven to and from the track , on drag radials and ran 9.33 . And in regards to the tune , Julio from Cartek has about 2 -3 hours total tuning time on my car , my car has never been logged going down the track , never been tuned at the track , that is going to change this year . Also , the compression is 9 to 1 . The converter is the same converter I ran the previous year when my car was NA , I think it's a 32-3400 stall . I've never bad mouthed any front mount turbo kits , I went with a rear mount because it was what I could afford at the time , and my car has proven they work , up to a certain level .
And I must say DAM!!!!! Im just counting the days now But 9 sec front mount 9sec rear mount whats the big deal 9 sec is 9sec 10 sec is 10 sec and so on. Power is power no matter how u get it Ok How about cryo2 Vs No2!!!!!
Old 05-06-2006 | 11:03 AM
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just for the record, i d like to see a front mount set up that you can not see, with the hood open. I build some rear mounts for f bodies....sure front when applicable but it work. On my own car, with the hood open you can not tell its not completely stock. It would pass a california visual inspec......I ve had people look for it....even under the back with a light and no one has seen it. I did it on my wifes car as a stealth kit....and it is perfect. I have passed for a v6 car even. I even run the stock oem muffler. On side note, if I pull up to a wicked looking front mount car, nitrous car, blower car......I always win the first time even if they are much much faster. They dismiss it like MIB. BTW I also run the stock air box even.
Old 05-06-2006 | 11:13 AM
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Originally Posted by 1320
just for the record, i d like to see a front mount set up that you can not see, with the hood open. I build some rear mounts for f bodies....sure front when applicable but it work. On my own car, with the hood open you can not tell its not completely stock. It would pass a california visual inspec......I ve had people look for it....even under the back with a light and no one has seen it. I did it on my wifes car as a stealth kit....and it is perfect. I have passed for a v6 car even. I even run the stock oem muffler. On side note, if I pull up to a wicked looking front mount car, nitrous car, blower car......I always win the first time even if they are much much faster. They dismiss it like MIB. BTW I also run the stock air box even.

I still like that the stock muffler sits behind the turbo so when people look under the car at night, they see the stock muffler and not the turbo even with a flashlight.
Old 05-06-2006 | 12:03 PM
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Originally Posted by 1320
just for the record, i d like to see a front mount set up that you can not see, with the hood open. I build some rear mounts for f bodies....sure front when applicable but it work. On my own car, with the hood open you can not tell its not completely stock. It would pass a california visual inspec......I ve had people look for it....even under the back with a light and no one has seen it. I did it on my wifes car as a stealth kit....and it is perfect. I have passed for a v6 car even. I even run the stock oem muffler. On side note, if I pull up to a wicked looking front mount car, nitrous car, blower car......I always win the first time even if they are much much faster. They dismiss it like MIB. BTW I also run the stock air box even.
Go look at an Incon twin kit car.....you won't see squat.

Also a P T K car will look fairly stock as well.



Old 05-06-2006 | 01:21 PM
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Jose, what 1320 is referring to is the big laughs we have had at the street races. We have had people inspecting the car with a light and they missed the TURBO!, even looking back behind the muffler and they couldn't see anything. To this day they are trying to figure out where the turbo is or even if it is actually turbo. The really does look completely stock. It probably helps that all the piping and turbo are painted black

The car has 3 mufflers, it's hard to hear it running unless the cut out has been opened. The setup has brought us many laughs on a sat night.

I've heard of hiding nitrous setups before, but never an entire turbo system
Old 05-06-2006 | 01:31 PM
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Originally Posted by JZ 97 SS 1500

Also a P T K car will look fairly stock as well.
Old 05-06-2006 | 01:45 PM
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No I mean.....oem bone stock......no fuel system, no relocated alt, no headers, no visiable alky injection, no visiable pressure pipe or none oem rubber couplers, nothing.....not even a visable intercooler....its funny, really, having a bunch of car guys around your car looking at wondering if it is turboed...I even reved it once for em and they laughed.......believing it was a bone stock camaro, not a gt76, intercooled, meth injected, th400 car that would eat there lunch.


I build turbo systems, and yes when space and use let it be done I agree with putting it up front, but space and use are important considerations.
Old 05-07-2006 | 03:43 AM
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Originally Posted by engineermike
That's true. The STS rear mount turbo's are sized the same as front mounts except the A/R ratio. The "correct" STS turbo would have a smaller A/R so it would spool quicker, but reduce power output. "Appropriately sizing" the STS turbo would have made things look even worse for it.

When I said I was doing a turbo versus supercharger comparison, everything else being equal, EVERYBODY said the test was invalid since I was using a supercharger cam and log header. When the turbo made 30 more rwhp, everybody said how great a test it was. If I had "optimized" the cam, then all other things wouldn't be equal, would they?

Mike
I have no time to read the whole thread so i apologize if this was addressed..but

My "spec'd" rear mount turbos are VERY different that my previous front mounts.. and NOT just A/R. All I will say is if an experienced turbo designer didnt build them (design), than you cant expect the best results. Several parameters were changed from my front to rear turbo design..when all else remained the same as far as the motor and drivetrain.
I spool a little later on the rears, and make a little less HP, but its still too much for any tire I have put on.
Just as one example of one of the several specs... , I have a 71 mm's, 76 Trims stuffed in T3 ex housings (twins here) .
Old 05-08-2006 | 11:40 AM
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Zombie, that is TOO FUNNY! And one drawback to the GTO setup: the turbo is further back, and thus is both more visible AND there is no room for a muffler, making it a bit louder than a stock car.

I have enjoyed the STS...but I want the instant throttle response from having turbos getting hotter exhaust gases. I am going to be one of the "early adopters" for the Gen TT setup out of Austrailia and see how that goes. But twin front mounts with heat blankets are a bit more noticeable! At least the exhaust will be quiet...
Old 05-09-2006 | 11:13 AM
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The gto seems like the perfect configuration for a single front mount in the engine bay...enough room, check, intercooler room, check, no oil pump system, check.

packaging......just packaging.


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