any R5/P7 turbocharged motors out there?
#618004
02/19/10 04:19 PM
02/19/10 04:19 PM
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Joined: Sep 2005
Posts: 769 Europa, Estonia
Georg
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From day to day Iam more and more thinking to trie build my new R5/P7 motor with turbocharger. Seems very interesting and ofcorse cost a lot, but seems to be worth to trie...? I got some good tips from "go green" but everyone who have some hints/tips to share are welcome! Thanks Georg
Outlaw Plymouth Valiant
R5/P7 Powered by Liuzzo Racing
COMP Performance Group dealer in Baltic
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Re: any R5/P7 turbocharged motors out there?
[Re: Georg]
#618006
02/22/10 12:28 PM
02/22/10 12:28 PM
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Joined: Jan 2003
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feets
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Go for it! I don't see why you shouldn't unless there's rules against it for the class you're going to be racing.
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: any R5/P7 turbocharged motors out there?
[Re: feets]
#618007
02/22/10 02:15 PM
02/22/10 02:15 PM
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Joined: Sep 2005
Posts: 769 Europa, Estonia
Georg
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There is no motor limits in our "ProStreet" class. What I ask here is help from you who have been there and done that. I mean building turbocharged race motor/motors. As turbo motors are quite new for me, I want to hear as many tips and thoughts as possible to make this project work first time and good.
Thanks Georg
Outlaw Plymouth Valiant
R5/P7 Powered by Liuzzo Racing
COMP Performance Group dealer in Baltic
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Re: any R5/P7 turbocharged motors out there?
[Re: Georg]
#618008
02/22/10 02:45 PM
02/22/10 02:45 PM
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Then turbocharge and beat the other guys. Like any other engine, keep it out of detonation. A turbo motor is less violent than a nitrous motor. It will live much longer.
It's not that hard to build. A moderate engine with sufficient boost will make serious power. You need to think about air flow. It needs to get in and out as easily as possible, just like any other engine. A fairly mild cam will work fine and require less exotic valvetrain.
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: any R5/P7 turbocharged motors out there?
[Re: feets]
#618009
02/22/10 03:43 PM
02/22/10 03:43 PM
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Joined: Sep 2005
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Georg
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Just that are there any R5/P7 Dodge motors out there which is turbocharged? I heard that there is... I ask it because what to know what good/bad sides R5/P7 motor have for turbocharging? Are the lower end strong enough etc.? Heads seems to be very good for doing it...
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Re: any R5/P7 turbocharged motors out there?
[Re: Georg]
#618010
02/22/10 04:38 PM
02/22/10 04:38 PM
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Joined: Sep 2008
Posts: 2,840 Flint, Michigan
B1Fish540
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Quote:
Just that are there any R5/P7 Dodge motors out there which is turbocharged? I heard that there is... I ask it because what to know what good/bad sides R5/P7 motor have for turbocharging? Are the lower end strong enough etc.? Heads seems to be very good for doing it...
Go here and ask your questions they will be happy to advise you. http://www.smreperformance.com/
I asked them about turbo on my hemi99 motor and they advised against it. They said the pro stock motors have light internal parts and could not take alot of boost(like 2000+ hp) Maybe the Nascar motors would be different, i dont know, but you could ask them and find out.
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Re: any R5/P7 turbocharged motors out there?
[Re: Georg]
#618012
02/22/10 11:38 PM
02/22/10 11:38 PM
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Three things to think about:
1) Most connecting rods fail on the exhaust stroke. The heavy piston flies upwards and there's no cushion of air (compression) to help slow it down. The crank pulls the rod down but the piston keeps going. It rips the rod in half and the piston slams the head. With a turbo motor there's some back pressure in the exhaust stroke. The piston is pushing the air into the turbo and creates boost in the exhaust header. That boost helps slow the piston. It's not an impressive amount of force but it is there.
2) RPM = death. If you spin a motor faster to make more power you're going to have trouble. Spinning an engine at 7200 rpm makes internal stress 144% higher than spinning it at 6000 rpm. If you keep the engine speed moderate you can make more power using turbos with less stress.
3) Maybe this chart will help you understand internal engine pressures better. The turbo motor in this chart makes twice the power of the naturally aspirated motor BUT the peak pressure is only increased 20%.
Slow the engine down 1200 rpm and turbocharge it to make more power with less stress on the connecting rods as well as the rest of the engine.
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: any R5/P7 turbocharged motors out there?
[Re: 105630]
#618016
02/24/10 12:15 PM
02/24/10 12:15 PM
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Joined: Sep 2008
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B1Fish540
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Quote:
I don't understand the people who say an 99 hemi can't be turbocharged.Yes you can't or don't want the rotating assembly the prostock guys use ,that given -I have a new crank ,rods and pistons and thick wall wrist pins that were made to my specs and see no reason this engine will not make power,the only thing I don't like is the block ,but it is a carbon block .They twist these engines to 10 thousand rpms and then drop the clutch and they seem to hold up petty good.Maybe I'm hard headed but I expect at least 2500 plus horsepower out this thing and that is not dreaming .If you are going to turbo any engine count on changing just about everything but block and heads ,and buy the best for the intended horsepower you plan and be honest in your goal and then go do it.If you listen to someone tell you it can't be done ,your never know if it will.
I was surprised they advised agaist it too. i was going to use all the stock components, tho, so maybe thats why they said that. I agree, the block is very strong and i think your motor will make all kinds of power!(and live!)
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Re: any R5/P7 turbocharged motors out there?
[Re: Georg]
#2186716
10/31/16 02:33 PM
10/31/16 02:33 PM
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Joined: Aug 2003
Posts: 43,719 Bend,OR USA
Cab_Burge
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I Win
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I know a 10.5 racer that used all three types of power adders including twin 88 MM turbo. Intercooling using race gas is mandatory to keep the motor out of detonation. He chose a water to air intercooler (it was twice as big as all the other racers in his class, he won that series every year he raced in it including when he used a Pro Charger ) with ice in it and he said to use the biggest one you can That was a real high $$$ maintenance motor though, short parts life IHTHs
Last edited by Cab_Burge; 10/31/16 02:34 PM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: any R5/P7 turbocharged motors out there?
[Re: Georg]
#2186728
10/31/16 02:39 PM
10/31/16 02:39 PM
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Joined: May 2011
Posts: 625 Oakville, Wa
HOTMOPR
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I heard rumors Wayne Jesel's boosted R5 made 2400hp..
67 Barracuda, 470" B, Glide, FuelTech FT600, Precision, Ptc, QA1, Calvert, Smith racecraft, Afco, Dana 60. 275 radials
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