Boos tspikeing with the "grainger MBC"
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Boos tspikeing with the "grainger MBC"
So I floor it in 2ed gear at 4k rpm, the boost sits at 6lbs, then hits 10lbs by 7k rpm. 3rd gear it does the same, 4th goes from 7 lbs to 11 lbs.
Any idea why it does this? And no, im not going to blow the engine. At 11 lbs of boot im at 12:1 A/F. It is annoying not gettting full boost at 5k rpm tho.
1st gear never reaches over 8 lbs, but its so short it doesent matter.
Any idea why it does this? And no, im not going to blow the engine. At 11 lbs of boot im at 12:1 A/F. It is annoying not gettting full boost at 5k rpm tho.
1st gear never reaches over 8 lbs, but its so short it doesent matter.
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I dont think I have a leak, but I guess its possible. I wish I had to dyno, would be easy to check lol.
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Odd you are having issues with spool, it's not that big of a turbo. I have a bigger turbo and spool at around 4200 in every gear, except 1st. My thought would have been restrictive exhaust, but with a 2.5" I don't think so.
NOTE: Just noticed it was on a 1.6 (not being observant). When I had my 1.8 BEGI S5 T3 (Stage 3 .63 A/R) w/ a 3" exhaust I was getting 12psi at about 3900-4000 rpms. So, it may just be the .63 A/R is too big for the 1.6.
#14
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You could temporarily hold the brake down a bit and see how soon you can get pressure up. That will tell if the lack of spool in 2nd is because of lack of load.
Odd you are having issues with spool, it's not that big of a turbo. I have a bigger turbo and spool at around 4200 in every gear, except 1st. My thought would have been restrictive exhaust, but with a 2.5" I don't think so.
NOTE: Just noticed it was on a 1.6 (not being observant). When I had my 1.8 BEGI S5 T3 (Stage 3 .63 A/R) w/ a 3" exhaust I was getting 12psi at about 3900-4000 rpms. So, it may just be the .63 A/R is too big for the 1.6.
Odd you are having issues with spool, it's not that big of a turbo. I have a bigger turbo and spool at around 4200 in every gear, except 1st. My thought would have been restrictive exhaust, but with a 2.5" I don't think so.
NOTE: Just noticed it was on a 1.6 (not being observant). When I had my 1.8 BEGI S5 T3 (Stage 3 .63 A/R) w/ a 3" exhaust I was getting 12psi at about 3900-4000 rpms. So, it may just be the .63 A/R is too big for the 1.6.
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