high comp turbo build help...
okay i have a d15b7 block with a y8 head wit y7 internals
the compression is around 10.7-10.9: 1 and im running a t3/t04e turbo at around 7-10 psi with a custom ramhorn. im using 450's injectors and crome chipped i need some insight at where i would have the timing at and if the compression is too high to run on 91 octane im looking to run around 10.8-11.2 a/f form low vac going onto boost and keeping timing around the same as stock maybe retarding it a couple degrees any help will be great..... P.S no nooobs answer!!!!!! i dont wanna hear your * dont go past 200whp * be conservative * make sure your tuner know what he's doing * make sure you dont detonate alright? so any help would be awesome thanks in advanced |
where is it at now? i have tuned a couple 10:1 cars but they were Bs i wanna say i was around 12-15* of timing in boost rpm dependent. this was on 93 oct not 91. I know you say dont throw a "dont be conservative but any changes smooth the map around it so that theres not drastic changes the car sees. I know the ecu pulls from 4 cells at a time but it makes the run wayyy smoother also how are you retarding by psi of doing a step retard
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right now im running all motor
but i have the parts to install. im just trying to find some info to see if ima have any huge problems on this setup so theres going to be a need to retard the timing around 12-15 degrees? on boost? what i meant when i said dont say be conservative was just dont say that, like if you got some more info besides just saying "be conservative" then i would love to hear it and thanks for replying =[/] |
That is a lot of compression for FI.
You will have to retard like a retard. |
no what i said is that if you look at your fuel map start out by retarding say 1.25* per psi that should be a good start also with your fuel set the comp efficiency at around 130% that should net you a nice rich safe base map to start with
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thank you very much for your help,
sorry if i sound like a complete noob but what does comp mean? do you mean compression or ??? |
compressor aka the money side of the turbo.
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ohhh okay thanks for the input.
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apples to oranges.. but i boost my vw with roughly 10.5-10.8to1 compression, on pump gas.
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Originally Posted by BRIAN MP5T
(Post 1276127)
That is a lot of compression for FI.
You will have to retard like a retard. there are a lottt of high compression turbo builds out there. There are a few 13:1 compression cars. My next build will be 11:1. just have to have a gooooooood tuner and sleeves will help , lol a lot of power at lower boost. |
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