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When is Power Output...Enough?

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bills Avatar
bills Bill Spohn
W. Vancouver, , BC, Canada   CAN
Crazy Ecotec owner has been developing his 2 liter engine in a Saturn Sky. He is twincharging it, using one turbo for low down and one for high rpm, using up to 39 psi of boost.

Just for fun he filled up with 116 octane race fuel and dynoed it. they haven't finished tuning yet, but the initial run produced 535 whp and 480 Tq.

That equates to about 630 bhp and 565 Tq at the flywheel. Obviously it will produce a bit more with tuning, but a bunch less on 94 octane fuel. Still, pretty impressive for a 2 liter 4 banger that fits into an MGB.Anyone wanting one in an MGB might want to opt for the GT, though - less likely to pretzelize the chassis with hard acceleration (assuming you could somehow get that to the ground). His tuner runs a Mitsubishi, also twincharged, at the drag strip - gets into the 7 second range.

I think that on cars like these you don't think in miles per gallon, but in miles per engine.....

The DSM:





Bill Spohn www.rhodo.citymax.com/carstuff.html
Current: 1958 MGA Twincam (race car (170 bhp)),1962 MGA Deluxe Coupe (98 bhp)
1957 Jamaican MGA (200 bhp)1965 1971 Jensen Interceptor (350 bhp)
2009 Pontiac Solstice GXP Coupe (350 bhp)
2007 BMW Z4M coupe (340 bhp)
Recent: 1969 MGC roadster (175 bhp),Jensen CV8 (375 bhp),
1969 Lamborghini Islero S (350 bhp), 1988 Fiero GT turbo (300 bhp)
North Vancouver BC

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V8MGBV8 Avatar
V8MGBV8 Carl Floyd
Kinggsport, TN, USA   USA
You can get the twin turbo version under the bonnet of a B?

bills Avatar
bills Bill Spohn
W. Vancouver, , BC, Canada   CAN
Turbos are a lot easier to position in in engine bay than a supercharger - you can even run them near the back axle, so I expect that one could do that. I wouldn't really advocate twin turbos when you can get an easy 450 bhp using just one - that should be sufficient for a 2,000 lb MG, don't you think? grinning smiley.



Bill Spohn www.rhodo.citymax.com/carstuff.html
Current: 1958 MGA Twincam (race car (170 bhp)),1962 MGA Deluxe Coupe (98 bhp)
1957 Jamaican MGA (200 bhp)1965 1971 Jensen Interceptor (350 bhp)
2009 Pontiac Solstice GXP Coupe (350 bhp)
2007 BMW Z4M coupe (340 bhp)
Recent: 1969 MGC roadster (175 bhp),Jensen CV8 (375 bhp),
1969 Lamborghini Islero S (350 bhp), 1988 Fiero GT turbo (300 bhp)
North Vancouver BC

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GWHITE75 Avatar
GWHITE75 Gold Member Gary White
Sugar Land, TX, USA   USA
1973 MG MGB "OldBlue#2"
1975 Chevrolet Corvette Stingray "Old Red"
2006 Chevrolet Corvette "OldBlue"
In reply to # 3731354 by bills Turbos are a lot easier to position in in engine bay than a supercharger - you can even run them near the back axle, so I expect that one could do that. I wouldn't really advocate twin turbos when you can get an easy 450 bhp using just one - that should be sufficient for a 2,000 lb MG, don't you think? grinning smiley.

Man, stuff would really have to be right for that kind of lb/hp. Fun, but dangerous on the street for me. I need a new motor, reading what’s been/being done here and am in the process of deciding on my path forward. I haven’t ruled out the turbo 4’s or may just stay with a newer version of my Buick V6, which could get a turbo in its future.

bills Avatar
bills Bill Spohn
W. Vancouver, , BC, Canada   CAN
Gary - take a look at the Ecotec swap threads. Dead easy 300 bhp, dead reliable with only a tune using stock equipment.



Bill Spohn www.rhodo.citymax.com/carstuff.html
Current: 1958 MGA Twincam (race car (170 bhp)),1962 MGA Deluxe Coupe (98 bhp)
1957 Jamaican MGA (200 bhp)1965 1971 Jensen Interceptor (350 bhp)
2009 Pontiac Solstice GXP Coupe (350 bhp)
2007 BMW Z4M coupe (340 bhp)
Recent: 1969 MGC roadster (175 bhp),Jensen CV8 (375 bhp),
1969 Lamborghini Islero S (350 bhp), 1988 Fiero GT turbo (300 bhp)
North Vancouver BC

GWHITE75 Avatar
GWHITE75 Gold Member Gary White
Sugar Land, TX, USA   USA
1973 MG MGB "OldBlue#2"
1975 Chevrolet Corvette Stingray "Old Red"
2006 Chevrolet Corvette "OldBlue"
In reply to # 3734470 by bills Gary - take a look at the Ecotec swap threads. Dead easy 300 bhp, dead reliable with only a tune using stock equipment.

Been doing that Bill and impressed. 300hp would be at the top of my hp requirement for the little car and from a 4cyl. I’m pulling out my motor this weekend, if Mother’s Day doesn’t interfere. Just kidding. Probably be sometime next week, so I need to choose a path forward soon.

slightly modified Avatar
slightly modified Silver Member Chuck Royer
Hayward, CA, USA   USA
1964 MG MGB "SLIGHTLY MODIFIED"
Back to your original question, too much is about right (I have about 500hp or so).

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Jim Stabe Avatar
San Diego, CA, USA   USA
In reply to # 3735072 by slightly modified Back to your original question, too much is about right (I have about 500hp or so).

I have around 535 and it seems about right.



Jim

"If you want me to agree with you then we would both be wrong"

'66 MGB widened 11" with supercharged LT1 Chevy and 6 speed, C4 Corvette suspension
Pictures here Part 1 http://forum.britishv8.org/read.php?13,7581
Continued in Part 2 http://forum.britishv8.org/read.php?13,22422
Continued in Part 3 http://forum.britishv8.org/read.php?13,33108
Continued in Part 4 http://forum.britishv8.org/read.php?13,40751
Continued in Part 5 http://forum.britishv8.org/read.php?13,48698,48698#msg-48698
Continued in Part 6 http://forum.britishv8.org/read.php?13,61672

V8MGBV8 Avatar
V8MGBV8 Carl Floyd
Kinggsport, TN, USA   USA
500 or so is just right? Be very careful about who else you let drive it!

IMO, 250-300 is the sweet spot for the B. Still be careful who you let drive it.

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lokiufgator Avatar
lokiufgator Gold Member Mike S
Evington, VA, USA   USA
Somewhere right around here would be good for me. Not sure how to fit it in a LBC though.


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939lnpfwecx01.jpg

Jim Blackwood Avatar
Jim Blackwood * BlownMGB-V8
Gunpowder Rd, Florence, KY, USA   USA
I have too much and it's just about right.

Jim

Jim Stabe Avatar
San Diego, CA, USA   USA
In reply to # 3735369 by V8MGBV8 500 or so is just right? Be very careful about who else you let drive it!

IMO, 250-300 is the sweet spot for the B. Still be careful who you let drive it.

Mine's a little wider, a little heavier and has a little wider tires than the average MGB. That said, I AM very careful about who gets to drive it.



Jim

"If you want me to agree with you then we would both be wrong"

'66 MGB widened 11" with supercharged LT1 Chevy and 6 speed, C4 Corvette suspension
Pictures here Part 1 http://forum.britishv8.org/read.php?13,7581
Continued in Part 2 http://forum.britishv8.org/read.php?13,22422
Continued in Part 3 http://forum.britishv8.org/read.php?13,33108
Continued in Part 4 http://forum.britishv8.org/read.php?13,40751
Continued in Part 5 http://forum.britishv8.org/read.php?13,48698,48698#msg-48698
Continued in Part 6 http://forum.britishv8.org/read.php?13,61672

bills Avatar
bills Bill Spohn
W. Vancouver, , BC, Canada   CAN
You guys let other people drive your cars??

When I build a car I often bolt the seat down in place as no one but me will ever drive it.

A friend let a relative drive his TR-3 and cautioned him not to try and put it in first before it was at a complete stop, as it had a non-synchro first gear. Kid swore he would do that. Came back 20 minutes later with a TR missing a tooth on first gear and a chipped one on the laygear. I don't think he has been foolish enough to let anyone else drive one of his cars since....



Bill Spohn www.rhodo.citymax.com/carstuff.html
Current: 1958 MGA Twincam (race car (170 bhp)),1962 MGA Deluxe Coupe (98 bhp)
1957 Jamaican MGA (200 bhp)1965 1971 Jensen Interceptor (350 bhp)
2009 Pontiac Solstice GXP Coupe (350 bhp)
2007 BMW Z4M coupe (340 bhp)
Recent: 1969 MGC roadster (175 bhp),Jensen CV8 (375 bhp),
1969 Lamborghini Islero S (350 bhp), 1988 Fiero GT turbo (300 bhp)
North Vancouver BC

V8MGBV8 Avatar
V8MGBV8 Carl Floyd
Kinggsport, TN, USA   USA
In reply to # 3735406 by bills You guys let other people drive your cars??


Yes. My son & daughter both first drove my BV8 at age 15. My ex drives it. Of course mine is not a monster like some.

I have drive many conversions over the years at V8 Meets. Sometimes with the owner, sometimes solo. Everything from mild conversion to 300-400hp beasts.

GWHITE75 Avatar
GWHITE75 Gold Member Gary White
Sugar Land, TX, USA   USA
1973 MG MGB "OldBlue#2"
1975 Chevrolet Corvette Stingray "Old Red"
2006 Chevrolet Corvette "OldBlue"
In reply to # 3735395 by Jim Stabe
Mine's a little wider, a little heavier and has a little wider tires than the average MGB. That said, I AM very careful about who gets to drive it.

I looked at your whole build Jim and have to restate what others have already said, you have quite the skills. Along with that, just crazy enough to have 535hp in it. I had a couple of cars, both dyno’d over 520rwhp and, though they weighed over 3klbs., we’re still a handful on the street. Got to hand it to you.

So, “When is Power Output...Enough?” It’s all relative! Best answer, so what did I win?

I forgot to wish all the Mothers out there a “Happy Mother’s Day”



Edited 1 time(s). Last edit at 2018-05-13 01:14 PM by GWHITE75.

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