968 Turbo conversion
08-20-2002, 07:59 PM
#1
Burning Brakes
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968 Turbo conversion
We are puting the final touches on the conversion for Trevors car.
Here are a few pictures of the process so far.
Please feel free to call me at the shop, or email me if anyone has any questions. I'd be glad to discuss this conversion option.
Take Care!
Here are a few pictures of the process so far.
Please feel free to call me at the shop, or email me if anyone has any questions. I'd be glad to discuss this conversion option.
Take Care!
08-27-2002, 12:21 PM
#2
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John, you may want to post this on the main 924/944/951/968 board. It gets alot more traffic than this one. A lot of people (including me) are very interested in how this turns out.
I'm VERY interested in the 3.1L NA engines you're offering. Could you post some specifics on these?
Thanks in advance.
I'm VERY interested in the 3.1L NA engines you're offering. Could you post some specifics on these?
Thanks in advance.
08-29-2002, 01:04 AM
#3
Burning Brakes
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HI Pete,
I'll gather all the details on the 2.8 and 3.1 liter engines we build, bot the turbo and the NA. I'll forward the email over to you. Give me a few days. There are a lot of options I will cover with each engine. None of them ordered, are the same, everyone wants a different tweak here and there. So, as a result, we are also learning more with each build. I've quite quite a good little book going now, cam grinds, piston to wall clearance on different race motors,compression schemes, valve grinding tid bits, head work, oil squirters etc etc...there is a lot of really good work in the motors. I don't intend to be secretive about it, and I will post as much as my fingers will allow. Its a fine balance, too much looks pushy, like spam :-)
Take Care
I'll gather all the details on the 2.8 and 3.1 liter engines we build, bot the turbo and the NA. I'll forward the email over to you. Give me a few days. There are a lot of options I will cover with each engine. None of them ordered, are the same, everyone wants a different tweak here and there. So, as a result, we are also learning more with each build. I've quite quite a good little book going now, cam grinds, piston to wall clearance on different race motors,compression schemes, valve grinding tid bits, head work, oil squirters etc etc...there is a lot of really good work in the motors. I don't intend to be secretive about it, and I will post as much as my fingers will allow. Its a fine balance, too much looks pushy, like spam :-)
Take Care
08-29-2002, 06:06 AM
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John I have a question about the intake pictured. It looks like a 951 intake.Is this the case? Does it bolt right up? Please excuse me if this has been covered. One last question. Why the cast intake? Why not a welded, fabricated intake where you could contol runner length,diameter and possible hotcoat the inside against heatsoak? Looks like a beautiful engine <img src="graemlins/bigok.gif" border="0" alt="[thumbsup]" />
08-29-2002, 12:47 PM
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Actually, its a cross between a 951 intake with the runners cut, and matched to an S2 intake flange. The number one runner does not match when doing this, so we had to insert a 3" extended tube on the number one runner to make it all work.
It bolts right on. As for a sheet metal intake, we wanted to keep it as stock looking as possible, no hotrod look. Heat soak won't be an issue, as it wasn't on the turbo.
Take Care.
It bolts right on. As for a sheet metal intake, we wanted to keep it as stock looking as possible, no hotrod look. Heat soak won't be an issue, as it wasn't on the turbo.
Take Care.
09-01-2002, 10:36 PM
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Burning Brakes
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Trevors car is done, and he is driving it home as we speak. 500 miles of fun I hope :-)
We test drove it last night, and it pulled pretty good. Trevor was able to get the tires to light up from a cruise of about ten miles per hour in first gear just by stomping the gas pedal.
NO over heating, actually, its about the smoothest NA to Forced Industion I've done. We are running the wastegate at a pre set 4psi boost, no boost controller, just a direct siganl from the intake. All 951 exhaust, with a delta gate wastegate. Stock 968 headers.
It will be put on the dyno in about a week, We'll make any small adjustements at that time. We may not be getting the full 4psi at tthis time, thats about my only concerne. I thnk with the force of the exhaust pressure inside the crossover pipe, and a direct signal from the intake, we may be getting the gate to open a little early. We'll see though. But it is a good strong pulling car :-)
Take Care!
We test drove it last night, and it pulled pretty good. Trevor was able to get the tires to light up from a cruise of about ten miles per hour in first gear just by stomping the gas pedal.
NO over heating, actually, its about the smoothest NA to Forced Industion I've done. We are running the wastegate at a pre set 4psi boost, no boost controller, just a direct siganl from the intake. All 951 exhaust, with a delta gate wastegate. Stock 968 headers.
It will be put on the dyno in about a week, We'll make any small adjustements at that time. We may not be getting the full 4psi at tthis time, thats about my only concerne. I thnk with the force of the exhaust pressure inside the crossover pipe, and a direct signal from the intake, we may be getting the gate to open a little early. We'll see though. But it is a good strong pulling car :-)
Take Care!
Trending Topics
11-26-2002, 11:10 PM
#8
Did you ever get that car on the dyno? I am VERY curious about this. Also, have any plans for an intercooler? Sorry if I am asking previously answered questions, but I just stumbled across this thread...
Regards, ...Scott
Regards, ...Scott
12-27-2002, 01:14 PM
#9
Intermediate
Hello John,
Did you have to modify the ECU? If not, how is ignition controlled incase of detonation? (unlikely for 4psi boost, but could happen with pump gas)
No check engine light? Will it pass smog check in CA?
Which turbocharger are you using? Can you post a picture of the exhaust plumbing under the car (where did you put the wastegate and the intercooler)?
Did you have to modify the ECU? If not, how is ignition controlled incase of detonation? (unlikely for 4psi boost, but could happen with pump gas)
No check engine light? Will it pass smog check in CA?
Which turbocharger are you using? Can you post a picture of the exhaust plumbing under the car (where did you put the wastegate and the intercooler)?
12-30-2002, 03:06 PM
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There is no intercooler. its direct to the throttle. As for the exhaust...identical to the 951. We just modified the flanges on the stock exhaust manifolds to fit the crossover section of the 951. Everything else is 951. and it all fit perfectly. The wastegate and assembly for the wastegate are aslo in the stock 951 location and are stock parts..
Take Care!
Take Care!
12-30-2002, 03:09 PM
#12
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By the way, I am in the final stages of a turbo conversion to an S2. I have pictures of the setup, but need to figure out how to load them, or maybe if I can send them to one of you guys, you can put them up for me?
Take Care!
Take Care!
12-31-2002, 12:29 AM
#13
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[quote]Originally posted by John Anderson:
<strong>I am in the final stages of a turbo conversion to an S2. I have pictures of the setup, but need to figure out how to load them</strong><hr></blockquote>If you can upload them to a location on your website you can then upload them to Rennlist... or send them to me and I'll do it for you. I should have them for my website anyway
<strong>I am in the final stages of a turbo conversion to an S2. I have pictures of the setup, but need to figure out how to load them</strong><hr></blockquote>If you can upload them to a location on your website you can then upload them to Rennlist... or send them to me and I'll do it for you. I should have them for my website anyway
12-31-2002, 12:58 PM
#15
Three Wheelin'
Hey John,
Do you have any more info on the 968 turbo conversion? Is it pretty much similar to the 968Turbo/968Turbo-S the factory had?
I'm not sure if I missed the discussion about the intercooler issue...but, where is it captureing the cooling air from?
Is the turbocharger water/oil cooled like the 952?
Hope I'm not beating a dead horse here, but I like the idea of using exhaust gas rather than putting on another belt, which will just rob the engine of power, to generate more power...
Supercharger seems kinda' seems like 2 steps back and then 2 steps forward...
Regards,
Jason Judd
Do you have any more info on the 968 turbo conversion? Is it pretty much similar to the 968Turbo/968Turbo-S the factory had?
I'm not sure if I missed the discussion about the intercooler issue...but, where is it captureing the cooling air from?
Is the turbocharger water/oil cooled like the 952?
Hope I'm not beating a dead horse here, but I like the idea of using exhaust gas rather than putting on another belt, which will just rob the engine of power, to generate more power...
Supercharger seems kinda' seems like 2 steps back and then 2 steps forward...
Regards,
Jason Judd