20g potential
Sorry for the delay guys but tuning will be taking place today as per Larry.
I am not there so I can only hope its getting done and I will get results later on today.
I will keep you posted. If all goes well, tomorrow is cold start tuning and the car will be done. That's when I fly out to SP and drive the beast home.
I am not there so I can only hope its getting done and I will get results later on today.
I will keep you posted. If all goes well, tomorrow is cold start tuning and the car will be done. That's when I fly out to SP and drive the beast home.
Dil seems pretty confident that he was maxed out on his 20g's at 650hp. Seems pretty low compared to all the 'math' that has been presented. Maybe more people are tuner limited than kit limited
but i'd rather have a non-ventilated crank case at the end of the day.
this thread hasnt narrowed down my options yet
but i'd rather have a non-ventilated crank case at the end of the day.this thread hasnt narrowed down my options yet

Low Boost (maybe spring pressure --> 1 bar)
Mid Boost
High Boost with Methanol
So far SP has:
Installed the CAN Gauge
Installed a Meth Kit Boost pressure sensor so the car will drop down to a safer map if the meth runs out.
Linked the meth kit to the ProEFI
Changed Spark plugs - since the last map made them flood out
He also installed a Boost Pressure Control **** (like a radio volume ****), so I can control the boost as I would like. ---> Sweeeet!
Tuning is next. I will update as Larry lets me know.
And you wondered if you picked the right shop for the tune???
considering Alberto made upwards of 7xxrwhp on 18G's, I'd certainly hope the 20g's make more.
tom
considering Alberto made upwards of 7xxrwhp on 18G's, I'd certainly hope the 20g's make more.
tom
Well on a really crappy tune (WAYYY too rich) the car made 640 on pump alone at 19 psi. With a good tune that should be much higher. In addition I think Larry has intentions of going up to 21 psi of boost. So who knows whats in store. I am leaving him in control of the car. I just requested multiple boost maps.
Low Boost (maybe spring pressure --> 1 bar)
Mid Boost
High Boost with Methanol
So far SP has:
Installed the CAN Gauge
Installed a Meth Kit Boost pressure sensor so the car will drop down to a safer map if the meth runs out.
Linked the meth kit to the ProEFI
Changed Spark plugs - since the last map made them flood out
He also installed a Boost Pressure Control **** (like a radio volume ****), so I can control the boost as I would like. ---> Sweeeet!
Tuning is next. I will update as Larry lets me know.
Low Boost (maybe spring pressure --> 1 bar)
Mid Boost
High Boost with Methanol
So far SP has:
Installed the CAN Gauge
Installed a Meth Kit Boost pressure sensor so the car will drop down to a safer map if the meth runs out.
Linked the meth kit to the ProEFI
Changed Spark plugs - since the last map made them flood out
He also installed a Boost Pressure Control **** (like a radio volume ****), so I can control the boost as I would like. ---> Sweeeet!
Tuning is next. I will update as Larry lets me know.
Last edited by thom000001; Dec 15, 2009 at 01:37 PM.
With proper supporting mods and fuel, the 20's will be capable of well over 700 whp, and probably up around the 800 whp range. That said, no matter what turbos you have, you are not going to get there on pump gas with a 3.5L motor spinning in the rpm ranges we operate (at least not for long). The limitation is the octane rating of the fuel, not the turbos!!!
For instance, I got over 600 whp (Mustang dyno) with 18G's at 17.5 psi on 93 octane. We had some headroom, but decided not to push it. It did not appear that we were anywhere near maxing out the turbos, however. Our limitation was the gas. That same limitation would have been there no matter what turbos we ran.
That said, you need to check the compressor maps for your turbos to ensure that you are not operating significantly out of the peak efficiency region. If you do, your intake air temperature will get a little high, which will decrease your ultimate HP potential. I have reviewed the compressor map for the 20G and there does not appear to be any issue with using these in a twin turbo setup on a 3.5L motor from getting well north of 700 whp. Again, you will need more than 93 octane to get there, or you will risk blowing the motor. This will be the case with any turbo you run, no matter how big the turbo is.
If you run twin 20G's with C16 or Q16, 700 whp should be a piece of cake. Using a whole lot of meth injection also may get you there. (This is based on my experience on a Mustang dyno, with a DJ I believe that it will be even easier).
For instance, I got over 600 whp (Mustang dyno) with 18G's at 17.5 psi on 93 octane. We had some headroom, but decided not to push it. It did not appear that we were anywhere near maxing out the turbos, however. Our limitation was the gas. That same limitation would have been there no matter what turbos we ran.
That said, you need to check the compressor maps for your turbos to ensure that you are not operating significantly out of the peak efficiency region. If you do, your intake air temperature will get a little high, which will decrease your ultimate HP potential. I have reviewed the compressor map for the 20G and there does not appear to be any issue with using these in a twin turbo setup on a 3.5L motor from getting well north of 700 whp. Again, you will need more than 93 octane to get there, or you will risk blowing the motor. This will be the case with any turbo you run, no matter how big the turbo is.
If you run twin 20G's with C16 or Q16, 700 whp should be a piece of cake. Using a whole lot of meth injection also may get you there. (This is based on my experience on a Mustang dyno, with a DJ I believe that it will be even easier).
Last edited by ttg35fort; Dec 15, 2009 at 03:09 PM.
^^^^
Awsome! I can't wait to see it. I have great confidence you will get there.
EDIT: I'm assuming the clutch is up to snuff. What clutch do you have?
Awsome! I can't wait to see it. I have great confidence you will get there.
EDIT: I'm assuming the clutch is up to snuff. What clutch do you have?
Last edited by ttg35fort; Dec 15, 2009 at 06:07 PM.
Thread Starter
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From: raleigh-wood NC
any new results, or are you still waiting on the full swap to E85?
Well, unfortunately it turned out to be a whole lot more than just the Flex Fuel System install. I needed a complete motor rebuild.
Bearing material discovered in the oil while base tuning. Should be done by end of the month (Feb) I hope.
(BTW the Flex Fuel swap is roughly about 1 hour labor to install. Just FYI for those wondering about the time and work involved to install. Its only $559 too.)
Look for news around then.
(BTW the Flex Fuel swap is roughly about 1 hour labor to install. Just FYI for those wondering about the time and work involved to install. Its only $559 too.)
Look for news around then.
Well, unfortunately it turned out to be a whole lot more than just the Flex Fuel System install. I needed a complete motor rebuild.
Bearing material discovered in the oil while base tuning. Should be done by end of the month (Feb) I hope.
(BTW the Flex Fuel swap is roughly about 1 hour labor to install. Just FYI for those wondering about the time and work involved to install. Its only $559 too.)
Look for news around then.
(BTW the Flex Fuel swap is roughly about 1 hour labor to install. Just FYI for those wondering about the time and work involved to install. Its only $559 too.)
Look for news around then.

Not sure why spun bearings seem to be such a hurdle on new motor builds...
Thread Starter
New Member
iTrader: (11)
Joined: Oct 2007
Posts: 8,807
Likes: 7
From: raleigh-wood NC
wow that's crazy. This is the motor you built a few years ago though right (as part of your DIY??)? I guess you didnt notice anything that may have contributed to a spun bearing?
Last edited by str8dum1; Feb 11, 2010 at 10:02 AM.




