mechanical injection and turbos?
#1063709
08/27/11 06:05 AM
08/27/11 06:05 AM
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Joined: Sep 2005
Posts: 769
Europa, Estonia
Georg
OP
super stock
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OP
super stock
Joined: Sep 2005
Posts: 769
Europa, Estonia
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Hi guys
Is here someone who uses mech.injection and turbos? I heard that finding right fuel curve may be difficult but thats about all problem what machanical injection may cause with turbocharger?
Fuel is methanol mixed with about 10% of nitromethane
Thanks
Georg
Last edited by Georg; 08/27/11 07:03 AM.
Outlaw Plymouth Valiant
R5/P7 Powered by Liuzzo Racing
COMP Performance Group dealer in Baltic
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Re: mechanical injection and turbos?
[Re: HEMIFRED]
#1063711
08/28/11 05:58 PM
08/28/11 05:58 PM
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Joined: Jan 2003
Posts: 28,078
Irving, TX
feets
Senior Management
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Senior Management
Joined: Jan 2003
Posts: 28,078
Irving, TX
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I'll agree with Fred. I can see nothing but trouble ahead with that combo.
We are brothers and sisters doing time on the planet for better or worse. I'll take the better, if you don't mind.
- Stu Harmon
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Re: mechanical injection and turbos?
[Re: Georg]
#1063713
08/29/11 07:19 AM
08/29/11 07:19 AM
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Joined: Jan 2005
Posts: 2,540
Milwaukee WI
TRENDZ
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master
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Posts: 2,540
Milwaukee WI
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Generally, mechanical injection is throttle angle based, which in a turbo application has almost no relation to how much(or little) fuel the engine needs. There are ways to make mechanical injection work related to manifold pressure (they do it an air planes all the time) but the expense/benefit ratio keeps guys from doing it.
"use it 'till it breaks, replace as needed"
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Re: mechanical injection and turbos?
[Re: TRENDZ]
#1063714
08/29/11 04:47 PM
08/29/11 04:47 PM
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Joined: Sep 2005
Posts: 769
Europa, Estonia
Georg
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super stock
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OP
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Joined: Sep 2005
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Europa, Estonia
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Quote:
Generally, mechanical injection is throttle angle based, which in a turbo application has almost no relation to how much(or little) fuel the engine needs. There are ways to make mechanical injection work related to manifold pressure (they do it an air planes all the time) but the expense/benefit ratio keeps guys from doing it.
So risk is too big for overboost motor? Iam askeing it because plan is to run motor as N/A next (first season with new my motor)season and useing methanol mixed with 25-30% of nitromethane with Hilborn shotgun style fuel system and later on add turbocharger. I was suggested to take a call to one professional named Spud Miller who defenately is expert on mechanical fuel systems and methanol/nitromethane fuels.He really is very outstanding guy and helped me a lot.He also told that turbochargeing should be no problem but yes with EFI the fuel curve can be tuned easier.
I also heard from another board that once you get mechanical system tuned right there is no need to play with set-ups much as also methanol with nitromethane is very stable across race weekand and there is no needs to change pills and jets?
What to think about useing prochargers with mechanical injection? It should be very similar to supercharger?
All thoughts and tips are welcome from you!Keep them coming!
Thanks
Last edited by Georg; 08/29/11 05:57 PM.
Outlaw Plymouth Valiant
R5/P7 Powered by Liuzzo Racing
COMP Performance Group dealer in Baltic
Premium Performance
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Re: mechanical injection and turbos?
[Re: TRENDZ]
#1063715
08/29/11 10:14 PM
08/29/11 10:14 PM
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Joined: Jul 2010
Posts: 3,502
SOUTH JERSEY
HEMIFRED
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master
Joined: Jul 2010
Posts: 3,502
SOUTH JERSEY
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being mechanical also means constant fuel delivery which translates into reversion problems with boost . EFI being timed no any concern
home of the
Sox and Martin Hemi Duster
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Re: mechanical injection and turbos?
[Re: joshking440]
#1063717
08/30/11 11:36 AM
08/30/11 11:36 AM
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Joined: May 2008
Posts: 1,238
North Cackilacky
sdaurity
pro stock
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pro stock
Joined: May 2008
Posts: 1,238
North Cackilacky
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If you are serious about doing the mech. injection you need to get ahold of travis quillen. He has many customers going very fast with those set-ups. I have talked with him a few times and he is a VERY smart guy on all boosted combos. http://www.quillenmotorsports.com/index.html
One day I will have something cool here.
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Re: mechanical injection and turbos?
[Re: Georg]
#1063722
08/31/11 07:12 AM
08/31/11 07:12 AM
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Joined: Jan 2003
Posts: 2,935
Finalnd, Perkele
jyrki
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master
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Finalnd, Perkele
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Especially on the "wrong" side of planet, with limited parts availability, limited funds and limited track conditions and driving opportunities, I would say that it is very unwise to try to reinvent the wheel. Most common practices are common practices becuase they work. If a thousand people have tried something and ended up to similar solution, at least I donät have the self confidence, nor time or funds to try "something different" and expect it to be better than the common practice. Spend the money where it needs to be spent, and save where it doesn't hurt the performance, safety or reliability. That way you'll end up enjoying the driving occasionally instead of sputtering and puking at the pits. 
Plynouth VIP '67 TT IC EFI
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