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| Engine & Transmission - *Sponsored by Track Dog Racing* Engine and Drivetrain related chats can be found in here. Power modifications, build-ups, etc. |
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#1 (permalink) |
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Member
Join Date: Apr 2006
Location: Stuttgart, Germany
Posts: 592
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I purchased a 91 Miata with the intention of making it a Nationally competetive CSP car. I just needed to find a nationally competetive co-driver.
The car I bought was a little long in the tooth, I knew the motor would have to be pulled and replaced with a 1.8 ITRB'd motor. Well the car I purchased had too many JDM parts on it to even start to think about making it legal under the CSP rules, so here I am wanting to JDM a Roadster. But... I started to think about the 1.8l swap and ITRBs anyway. With a 99-00 motor, ITRBs and ECU, I was looking at $5000. I decided to cheap out and hook a brother up. A buddy of mine had a motor built to the hilt by FM and he overheated the motor at the Gap 2 years ago. He (actually Hector at R*Speed) pulled the motor and dropped in a 1.8. He gave me the built to the hilt motor and I am going to send it back to FM for the rebuild and eventual turbo. Specs on the motor (before the rebuild)- Crank knife-edged/lightened (3# lighter than stock) 1mm oversize bores Carillo rods/Wiseco pistons (9:1) thicker gasket = 8.8:1 cr now (~ 2# lighter than stock for all 4) ARP studs Ferrea 1-piece stainless steel valves constant-radius valve job head is gasket-matched/bowls polished new HLAs (twice!) new valve springs (stock though) new belts/H2O pump, etc on the front oil pan drilled/tapped for tulbro oil return while motor was apart new oil pump all new gaskets of course One problem I have is the matched intake manifold is gone to a California hippie and I would like to get it back (yes, you Mr. Woolery). The best case scenaio for a rebuild is $2000 so I am dangerously close to a 1.8l swap which will give me mre hp than this motor, but the built to the hilt will stand 15+lbs of boost. Calling Joe to ship the motor to FM, putting the rest of the car on hold (paint, interior, suspension...) I'll post updates as I get them. All the shipping, rebuilding, installation is being done via email from Iraq and good freinds at R*Speed. |
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__________________
1991 Miata
2011 BMW X5 35d 2006 MCS 2006 BMW HP2, 2009 BMW GSA, 2009 HD XR1200 Lotus Elise-Coming Soon! |
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#4 (permalink) |
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Mufasa in Training
Join Date: Mar 2006
Location: Cincinnati, OH
Posts: 15,742
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Problem is...a built turbo motor is very different from its N/A counterpart. The compression ratio is normally 2 or more points lower, which affects your numbers.
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#6 (permalink) | |
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Member
Join Date: Apr 2006
Location: Stuttgart, Germany
Posts: 592
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Quote:
The motor is at R*Speed in Atlanta. Joe will ship the motor to FM. Car will get towed to R*Speed in June. I'll fly to Atlanta on Deals Gap week to pick up the car. I get a mid-tour leave and will pick up the car then. Part of the tradition of my deployments are coming home to a garage full of parts I purchased while over here. The military knows logistics and I have a very supportive wife and a great friend in NorCal. |
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__________________
1991 Miata
2011 BMW X5 35d 2006 MCS 2006 BMW HP2, 2009 BMW GSA, 2009 HD XR1200 Lotus Elise-Coming Soon! |
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#7 (permalink) |
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Member
Join Date: Apr 2006
Location: Stuttgart, Germany
Posts: 592
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**UPDATE**
Shipping to FM from ATL and back would have been about 1/3rd of the turbo cost. So I started to look local (to the motor) for the rebuild. On recommendations from R*Speed Joe and Rob Ebersol, the motor is finally at Maloof Racing in Atlanta for the post mortem and rebuild. If the motor is toast look for some good turbo pistons, Carillo rods and a knife edged and lightened crank in the classifieds. If that is the case I will go with a 99-00 swap and maybe get some BRP whinner power. Now, I am going with Mazdaspeed engine mounts and a new clutch/flywheel combo. What else should I do (actually have done) while the motor is out? Standard I may have to borrow a Miata for DG this year. Yeah I'm talking to you 91Eunos! |
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__________________
1991 Miata
2011 BMW X5 35d 2006 MCS 2006 BMW HP2, 2009 BMW GSA, 2009 HD XR1200 Lotus Elise-Coming Soon! |
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#9 (permalink) |
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Member
Join Date: Apr 2006
Location: Stuttgart, Germany
Posts: 592
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UPDATE 23 OCT
Just surced a block from Tom at The Parts Group~ great guy great prices and service! The block FM had overbored was overbored too much- you could move the piston inside of the cylinder. Shipping from Danville Ala to Atlanta Ga was 2x the price of the block! Now I will find out the price of high quality machine work...just had to have the 93LE interior and a Koyo Radiator and Adjustable end links and Nielex PW switches and Volks |
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__________________
1991 Miata
2011 BMW X5 35d 2006 MCS 2006 BMW HP2, 2009 BMW GSA, 2009 HD XR1200 Lotus Elise-Coming Soon! |
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