toastemcutlass Posted April 7, 2003 Report Share Posted April 7, 2003 I'm getting a t-25 turbo maybe two from a friend, and was just wondering what i have to do to produce correct vaccum for the trans to shift. also the power brake booster. anybody know, maybe from automatic tgp(if they exist) Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted April 7, 2003 Report Share Posted April 7, 2003 All TGP's came with an auto. If your planning on putting the turbo on your Cutlass you don't need to do anything to the tranny. Quote Link to comment Share on other sites More sharing options...
NOHC_WBody Posted April 8, 2003 Report Share Posted April 8, 2003 All TGP's came with an auto. If your planning on putting the turbo on your Cutlass you don't need to do anything to the tranny. except stand back and wait for the tranny to explode if you don't have it rebuilt Quote Link to comment Share on other sites More sharing options...
toastemcutlass Posted April 8, 2003 Author Report Share Posted April 8, 2003 well it wouldnt be the first time, or second or third oh well i want to get a manual this summer. Quote Link to comment Share on other sites More sharing options...
NOHC_WBody Posted April 8, 2003 Report Share Posted April 8, 2003 well it wouldnt be the first time, or second or third oh well i want to get a manual this summer. Ya a' preachin' to the choir here bud. I went through 5 4T60-E's in my GTP in two and a half years two were reaction drive failures one was a diff explosion one was a clutch band disintergrating and the final was the chain breaking Thank God for the GMPP warranty Quote Link to comment Share on other sites More sharing options...
toastemcutlass Posted April 8, 2003 Author Report Share Posted April 8, 2003 how do i control the waste gate(i know vaccum) does the computer normally do that? Quote Link to comment Share on other sites More sharing options...
toastemcutlass Posted April 8, 2003 Author Report Share Posted April 8, 2003 so if the tgp are auto can i use the computer from one? sorry about all the ?'s just really excited about the turbos. Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted April 8, 2003 Report Share Posted April 8, 2003 how do i control the waste gate(i know vaccum) does the computer normally do that? I believe the wastegates are springloaded. Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted April 8, 2003 Report Share Posted April 8, 2003 so if the tgp are auto can i use the computer from one? Computer- Doubt it Chip- No Way Quote Link to comment Share on other sites More sharing options...
Robby1870 Posted April 8, 2003 Report Share Posted April 8, 2003 how do i control the waste gate(i know vaccum) does the computer normally do that? I believe the wastegates are springloaded. :withstupid: Robby Quote Link to comment Share on other sites More sharing options...
Robby1870 Posted April 8, 2003 Report Share Posted April 8, 2003 so if the tgp are auto can i use the computer from one? Computer- Doubt it Chip- No Way Yeah the computer for the TGP is based on a MAP and MAT right? And toastemcutlass's is based on MAF, there for, no worky! Robby Quote Link to comment Share on other sites More sharing options...
brian89gp Posted April 8, 2003 Report Share Posted April 8, 2003 You are gonna turbo the 94 3.4 right? If so its the same thing that i am doing, same year same engine. I'm using a 91-93 DOHC ecm and wiring and am going to make it work. computers: you can use the stock one with MAF and use one of those aftermarket systems to 'fool' the ecm to add more fuel, wehter by a rising rate fuel pressure regulator or a fancy 7th injector setup. as far as the majority is concerned this code mask is untunable you can put a tgp ecm in, but you have to swap in the wiring harness as well. It will control the engine fine, but at the expense of a lot of time tuning. Unfortunately you will loose your 4t60e controls you can use the ecm from the 91-93 dohc which is tunable. you retain 4t60-e controls (have to change the internal trans wiring) but to get it to work on a 2 bar map is a lot of work aftermarket ecm Quote Link to comment Share on other sites More sharing options...
GnatGoSplat Posted April 8, 2003 Report Share Posted April 8, 2003 You'll also need a TGP type modulator. Non-aneroid or something like that. Also a boost blowoff valve for it. Quote Link to comment Share on other sites More sharing options...
toastemcutlass Posted April 9, 2003 Author Report Share Posted April 9, 2003 You'll also need a TGP type modulator. Non-aneroid or something like that. Also a boost blowoff valve for it. what is the modulator and non-aneroid? whats the difference between blowoff valve and waste gate is the waste gate the excess pressure and the blow off is when all the pressure is let loose b/f shifts? Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted April 9, 2003 Report Share Posted April 9, 2003 The modulator goes in the front of the tranny. Non- aneroid is the type of modulator. The think the blowoff valve he's talking about goes on the modulator. It's a check valve that let's vacuum go to the tranny but when making boost it bleeds it out to avoid damaging the tranny. Quote Link to comment Share on other sites More sharing options...
RedZMonte Posted April 9, 2003 Report Share Posted April 9, 2003 Couple of things. * 3.4L DOHC will not work w/ a T25 period. you will NEED a T4 based turbo. * w/ a MAF car you put the MAF in the intake side of the trubo and then use a FMU and possibly a MINI AFC (ZZPerformance.com) and fine tune the fuel w/ the mini AFC or the ICCU (standard style AFC). * Get a 2nd stock front log manifold for the rear * make a custom X-over and downpipe TimG, Brian and myself are all Turboing our cars. Brian is using a Toyota CT26 turbo (looks large not sure what it is), TimG and myself are using T04B-H3's (or the eleged "T04E's" as we call them.. Long story.) as for the wastegates if you have an internal wastegate you can adjust the accuator arm to set the boost or run a boost controler to controle the boost. as for a external gate it has a set spring and it will run at "X" ammount of boost depending on the spring. or you can also get a boost controler to controle it as well. RedZ Quote Link to comment Share on other sites More sharing options...
brian89gp Posted April 9, 2003 Report Share Posted April 9, 2003 The above method is the 'fool the ecm' approach. Simple and effective, I'm just a glutton for punishment and am doing it the harder and better way. lol The CT-26 is actually a smaller turbo, probably equilivent to a smaller T3. It was originally from the 3.0 DOHC supra motor, some lag but could build 15psi of boost on that engine. After I bought it i found that it has some sort of T4 sized compressor wheel, so I should be looking at a little more airflow. Since my motor is a 3.4 and i'm not looking for anything more then 8-10 psi, it should work fine. The larger displacement of my engine will probably totally eliminate lag and the larger compressor wheel should provide enough air for 10psi. As for why i chose that turbo, I have no clue... Quote Link to comment Share on other sites More sharing options...
toastemcutlass Posted April 10, 2003 Author Report Share Posted April 10, 2003 ok found out more about the turbos, there not t-25 they are from an 86 daytona. from what i came up with it is a garrets/AiResearch t3 Quote Link to comment Share on other sites More sharing options...
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