go 90mm TB or go home?
06-08-2006 | 09:55 AM
#31
Originally Posted by Holty
got the 90mm TB installed along with my 05 e-fans. I did the e-fans last saturday and did the 90mm TB conversion Tuesday afternoon. I wanted to drive the truck a little before i posted up with my results. after the e-fan install, i noticed no SOTP gain at all, though, i really wasn't expecting to. with that said, i love the e-fans, my ECT's are down ALOT. was a easy install and the nelson harness made wiring a breeze.
completed the install on the 90mm TB on tuesday afternoon, took about 2.5hrs. was a real bitch getting the bolts off the j-tube. (special thanks to wkdivr). anyhow, i felt no SOTP gain from the conversion, though, again, i did not expect to. I did however seem to feel a DECREASE in throttle response. Don't know why? i'm gonna talk to zippy to see if we can tune that out, not sure. so far, i havn't gotten enough miles on it to tell if the IAT's are down any or not. i was hoping that mod would help in my boost issue, but it did not, still only seeing about 7-8psi with the 2.8 pulley. crank pulley and/or belt is NOT slipping.
NOTE: the only tuning i did after the 90mm TB install was i added 5* of timing acrossed the board to the high and low octane spark tables.
completed the install on the 90mm TB on tuesday afternoon, took about 2.5hrs. was a real bitch getting the bolts off the j-tube. (special thanks to wkdivr). anyhow, i felt no SOTP gain from the conversion, though, again, i did not expect to. I did however seem to feel a DECREASE in throttle response. Don't know why? i'm gonna talk to zippy to see if we can tune that out, not sure. so far, i havn't gotten enough miles on it to tell if the IAT's are down any or not. i was hoping that mod would help in my boost issue, but it did not, still only seeing about 7-8psi with the 2.8 pulley. crank pulley and/or belt is NOT slipping.
NOTE: the only tuning i did after the 90mm TB install was i added 5* of timing acrossed the board to the high and low octane spark tables.
BlownChevy's boost increase was using an open element cone filter and stock exhaust manifolds, he saw 1lb increase in boost.
you added 5* of timing and felt nothing?
06-08-2006 | 09:56 AM
#32
I am not sure what to tell you. Time and time again, I see 20 rwhp from just bolting on the TB and another 25-30 from the added timing. If you are telling me you added 5* of timing ACROSS the board, then there is something wrong....the timing alone is worth about 30-40 rwhp. Have a professional Tuner look at it and go from there.
06-08-2006 | 10:00 AM
#33
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Notorious BIG
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Originally Posted by moregrip
you have to think of the intake plumbing (pre blower) as a system. Are you breathing through a stock airbox? aftermarket? I wouldn't expect more than .5lb of boost gain especially if you have a high flowing exhaust.
BlownChevy's boost increase was using an open element cone filter and stock exhaust manifolds, he saw 1lb increase in boost.
you added 5* of timing and felt nothing?
BlownChevy's boost increase was using an open element cone filter and stock exhaust manifolds, he saw 1lb increase in boost.
you added 5* of timing and felt nothing?
06-08-2006 | 10:07 AM
#34
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Notorious BIG
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Originally Posted by BlownChevy
I am not sure what to tell you. Time and time again, I see 20 rwhp from just bolting on the TB and another 25-30 from the added timing. If you are telling me you added 5* of timing ACROSS the board, then there is something wrong....the timing alone is worth about 30-40 rwhp. Have a professional Tuner look at it and go from there.
there is nothing wrong, the truck runs VERY good and pulls VERY hard. you can't run 12.60's in a truck if there were someothing wrong with it. i'm just saying i didn't really notice any difference between before and after the 90mm TB and the timing increase. also, my low end throttle response has seemed to not be as "touchy" as it was before. i want to make it clear, i have seen no ill effects of doing this mod, just not "feeling" the gains on the SOTP meter (even though i didn't expect to feel much). as far as tuning goes, i know what i'm doing, but by no means am a professional. zippy has been helping me out with tuning. i would consider him a professional. also, if you'd like, i can send you my tune/logs for review?
06-08-2006 | 10:13 AM
#35
Originally Posted by Holty
there is nothing wrong, the truck runs VERY good and pulls VERY hard. you can't run 12.60's in a truck if there were someothing wrong with it. i'm just saying i didn't really notice any difference between before and after the 90mm TB and the timing increase. also, my low end throttle response has seemed to not be as "touchy" as it was before. i want to make it clear, i have seen no ill effects of doing this mod, just not "feeling" the gains on the SOTP meter (even though i didn't expect to feel much). as far as tuning goes, i know what i'm doing, but by no means am a professional. zippy has been helping me out with tuning. i would consider him a professional. also, if you'd like, i can send you my tune/logs for review?
Please send me your .bin file and some data from a run. I am not knocking zippy, I did not realize he was doing your tuning.
bzacuto@hotmail.com
06-08-2006 | 10:17 AM
#36
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Notorious BIG
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Originally Posted by BlownChevy
Please send me your .bin file and some data from a run. I am not knocking zippy, I did not realize he was doing your tuning.
bzacuto@hotmail.com
bzacuto@hotmail.com
email sent!
06-08-2006 | 10:29 AM
#37
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From: Las Vegas, NV
I didn't add the 5º myself, I assume Holty did that. With the extra 5º that would put him at 24º of timing not including any added by the IAT or ECT table if he's running it cool. That is too much timing. I don't even see a reason to have added any timing over what it was set up for already and if any was added it should have been no more than about 2º total. Most people gaining alot by adding timing because they are running the 90mm are claiming that it's because of the lower IAT's. If you're programming a Radix properly to begin with your IAT table should be adding the timing at lower temperatures already.
06-08-2006 | 10:34 AM
#38
Originally Posted by BlownChevy
You will see about 25-30 rwhp just by bolting it on, I highly suggest doing it. You will see some more power once you tune for the TB (not needed but reccomended). I have it done on mine and have not had one ounce of trouble, just buy the entire kit from Richard and get er done.
06-08-2006 | 10:41 AM
#39
Originally Posted by zippy
I didn't add the 5º myself, I assume Holty did that. With the extra 5º that would put him at 24º of timing not including any added by the IAT or ECT table if he's running it cool. That is too much timing. I don't even see a reason to have added any timing over what it was set up for already and if any was added it should have been no more than about 2º total. Most people gaining alot by adding timing because they are running the 90mm are claiming that it's because of the lower IAT's. If you're programming a Radix properly to begin with your IAT table should be adding the timing at lower temperatures already.
Why would you use the IAT/ECT table to add timing when the vehicle is in its normal operating range? The way I see it, there is NO timing being added in the NORMAL operating area, the only time that the IAT/ECT correction table should be used is in the extremes......
Example:
anything below 131* should be ZERO, why add it there?....use the high and low tables to do your normal operating range tuning. I dont see any advantage to this, if I am missing something let me know.
If holty added 5* across the board, then more than likely it is seeing some knock retard....a 2.8 pulley w/ 24* of timing on a LQ9 is just asking for disaster IMO. I still hold firm, properly tuned....the gain from the TB will be 35-45 hp.
06-08-2006 | 11:16 AM
#40
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From: Las Vegas, NV
You ask a good question of why use the IAT or ECT to add timing. My question would be why not. Why wouldn't you have a 1º to 2º more timing when the engine is at around 170º compared to say 195º. The same goes for the intake air temperature. When you're driving around in good cool air and the blower isn't hot you have considerably less chance of any knock occuring compared to when you're driving in hot weather or you've heated the blower up from a few wide open runs. I've gained quite a bit changing those tables in 60' time as well as gains in milage by running a bit more timing when the engine and blower air temperature aren't running hot. The tables you see aren't just something I pulled out of the sky, those are numbers that have been adjusted many times from actuall drive time with hours of logging in Radix trucks.