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5Likes
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1
Post By Cobra #3170
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2
Post By 1985 CCX
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1
Post By RodKnock
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1
Post By dallas_
04-19-2017, 02:05 PM
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CC Member
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Join Date: Apr 2007
Cobra Make, Engine:
Posts: 1,009
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Not Ranked
New engine for CSX3170
The new engine is finally done we had some water leak issues during dyno runs the last two weeks but made final power runs today. I am very happy with the results we went from 498 cid to 440 cid and lost 150 lb/ft at 4000 rpm and 84 lb/ft in peak torque. I was trying to reduce low speed torque as many of you who followed this saga know. The new set up makes 431 lb/ft at 3250 and 266 hp this is about 21 mph in first gear which should be perfect. The new engine is down about 10 horse power vs the 498 but makes it at higher rpm. Peak corrected power is 850 at 8000 and is still over 800 at 8750. It noses over at 9000 to the high 600's and drops to about 650 at 9100. It should run reliably to 9300 but we will not need much over 9000 for GoodGuys. Some interesting things, the tuner suggested we buy new Bosch 65# injectors with their superior spray pattern. This is the first time we made more power with the injection than the dyno Dominator they use for break in. This engine likes more advance than the stroker engine did. I hope it works as well in the car as it does on the dyno!
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04-19-2017, 02:14 PM
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Senior Club Cobra Member
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Join Date: Mar 2005
Location: Manchester,
NH
Cobra Make, Engine: AK1085 (302), HTM111 (427 Comp), CSX2375R (289 Comp) and Scratch 427 S/C
Posts: 18,750
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Not Ranked
Need pics.... this is a multi sense website..
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04-19-2017, 02:21 PM
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CC Member
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Join Date: Apr 2007
Cobra Make, Engine:
Posts: 1,009
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Not Ranked
Pictures
It is identical on the out side I posted pics of crank, rods, pistons, manifold and head work earlier should be in my gallery. The crank is a work of art as are the rods much smaller and lighter. Of course they have to be to turn that rpm.
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04-19-2017, 02:57 PM
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Senior Club Cobra Member
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Join Date: Feb 2007
Cobra Make, Engine: KMP 539, a Ton of Aluminum
Posts: 9,588
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Not Ranked
Quote:
Originally Posted by 1985 CCX
Need pics.... this is a multi sense website..
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Or in the case of Patrick.....no sense.
How about a video of the engine doing 9,000 RPM?
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04-19-2017, 03:04 PM
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CC Member
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Join Date: Aug 2013
Location: Canandaigua,
NY
Cobra Make, Engine: SPF MKII Riverside Racer FIA
Posts: 2,471
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Not Ranked
Post a video of it running so that we can hear it running. It must sound awesome at those high revs.
__________________
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04-19-2017, 04:33 PM
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CC Member
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Join Date: Apr 2007
Cobra Make, Engine:
Posts: 1,009
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Not Ranked
Video at 9000
Quote:
Originally Posted by RodKnock
Or in the case of Patrick.....no sense.
How about a video of the engine doing 9,000 RPM?
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They did not video it at 9000 even though I asked for it. Will have to do an in car after it is installed. They made so many pulls below 8000 that it is half worn out already.
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04-19-2017, 08:43 PM
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CC Member
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Join Date: Aug 2009
Location: scottsdale,
az
Cobra Make, Engine: FF5 347 stroker
Posts: 867
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Not Ranked
See you at the Good Guys in Scottsdale, I hope.
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04-19-2017, 09:00 PM
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CC Member
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Join Date: Apr 2007
Cobra Make, Engine:
Posts: 1,009
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Not Ranked
Goodguys
Quote:
Originally Posted by hinoonaz
See you at the Good Guys in Scottsdale, I hope.
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Me too, have to put it back together debug it and then get it qualified
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04-20-2017, 04:25 AM
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CC Member
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Join Date: Sep 2009
Location: Dallas,
tx
Cobra Make, Engine: FFR track car, SL-C track car
Posts: 1,262
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Not Ranked
Quote:
Originally Posted by hinoonaz
See you at the Good Guys in Scottsdale, I hope.
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And I hope to see you at the Good Guys in D/FW.
9,000 rpm. wow.
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04-20-2017, 09:25 AM
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Abnormal CC Member
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Join Date: Jan 2005
Location: Pottstown (East Coventry),
PA
Cobra Make, Engine: Don't think I'll be getting a Cobra for a long time... Do have '94 RX-7 R2.
Posts: 2,315
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Not Ranked
Quote:
Originally Posted by Cobra #3170
They did not video it at 9000 even though I asked for it. Will have to do an in car after it is installed. They made so many pulls below 8000 that it is half worn out already.
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Interesting. How long do you expect this engine to last before it needs to get rebuilt?
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04-20-2017, 09:49 AM
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CC Member
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Join Date: Apr 2007
Cobra Make, Engine:
Posts: 1,009
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Not Ranked
Engine Life
Quote:
Originally Posted by 1ntCobra
Interesting. How long do you expect this engine to last before it needs to get rebuilt?
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2- 3 years unless something breaks. I have the best valve springs I could get and the crank and rods are also the best available so given that it should be as reliable as the old engine. Everything was perfect on the old engine and it was 3 years old. Valve springs had the same pressure as they did when installed and
the new ones are a higher grade of steel. Bearings could have been reused too. We change fluids regularly and spin the dry sump pump when ever the car sits too long.
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