1.22 exhaust side too big?
12-22-03, 08:37 PM
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1.22 exhaust side too big?
hey i was jus wondering if a 1.22 exhaust side would be too big on a large street ported s5 engine? also running bigger injectors..i think 750 or 950 sumthin like that. also the compressor side is .70. let me knoww hat ya tyhink also 4" downpipe coned down to a 3" or should i go wit a 3"
12-22-03, 10:03 PM
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If we know what "frame" turbo you are refering too then it would make some more sence.
A 1.22 a/r is available in the Garrett T51 range = fairly large.
A 1.22 a/r in a T51 is bigger than a 1.52 in a TO4 series turbo.
If you make a nice manifold a 1.22 is not to big, but if you want boost at idle
then you are looking at the wrong turbo anyway. 1.22 is nice a few people run a 1.05 (still bigger than 1.32 in a TO4) and get good boost by 3500rpm on a street port with a decent manifold.
1.22 on a street port will give you a "strong" power band from 6k to 9k on a street port 13B engine.
A 1.22 a/r is available in the Garrett T51 range = fairly large.
A 1.22 a/r in a T51 is bigger than a 1.52 in a TO4 series turbo.
If you make a nice manifold a 1.22 is not to big, but if you want boost at idle
then you are looking at the wrong turbo anyway. 1.22 is nice a few people run a 1.05 (still bigger than 1.32 in a TO4) and get good boost by 3500rpm on a street port with a decent manifold.1.22 on a street port will give you a "strong" power band from 6k to 9k on a street port 13B engine.
12-23-03, 01:19 AM
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I run a 1.22a/r turbine on a TA51 turbo (I just found out that my compressor is actually larger than a TA51 with the 76mm wheel!!) on a halfbridged motor , boost builds rather quickly from 4000rpm up and the top end is scary at only 15psi boost.
12-23-03, 09:37 AM
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hey thanks for the help man. i appreciate it alot..so spool won't be that bad with a large street port? when do u think he should get boost by den?
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