LT1-LT4 Modifications 1993-97 Gen II Small Block V8

LT1 CSR 901LT1 EWP Electric Water pump height ?

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Old 03-07-2010, 08:16 PM
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Yeah its a good idea while its out. I didn't the first time I put it in my car and right when the car turned on it started leaking
Old 03-07-2010, 10:36 PM
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Since the WP is no longer shaft driven if the CSR hits the fan blades you could mill the WP surface that mates to the block slightly.
Old 03-10-2010, 05:27 AM
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Project is done .
Tight fit , I have about 1/8" between the tip of the pump and the fan shroud.




Modified timing cover.




Optispark back in.






Pump in place.








Tight fit.




















I'm now ready to pull the car out of storage , put insurance and plate and give it a try.

I bought the car last fall but I had to put it away because it was very late and snow was around the corner.
Old 03-24-2010, 03:51 PM
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nice work
Old 03-24-2010, 08:35 PM
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Here's some feedback after about 2 weeks of driving.
It is working perfectly , temperature is always the same , either traffic stop and go or highway.
Very happy with my water pump and no more oil leak from the waterpump shaft ( it has been deleted ) .
I'm unable to tell if there is HP gain since I haven't put the car on the dyno before and after.
Old 04-02-2010, 12:13 PM
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I had the same thing happen to my MSD Opti, it came apart on a dyno with less than 300 miles on it. Both the screw backed out on the rotor. That was a expensive lesson.
Old 04-02-2010, 12:29 PM
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I was very lucky to found that out , glad I decided to take it apart after hearing something moving in it.

Screws has been locked tite so I should be fine. So far the car runs great. I love the RX7 with the LT1 in it.
Old 04-02-2010, 12:33 PM
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Originally Posted by mpcv2000
I was very lucky to found that out , glad I decided to take it apart after hearing something moving in it.

Screws has been locked tite so I should be fine. So far the car runs great. I love the RX7 with the LT1 in it.
Its a light car compared to my convertible. I locktited both the screws on mine, and it seems to be holding so far.
Old 04-02-2010, 12:37 PM
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Originally Posted by fex77k
Its a light car compared to my convertible..
2888 Lbs full interior full everything..
Old 04-02-2010, 03:03 PM
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Originally Posted by mpcv2000
2888 Lbs full interior full everything..
I took out my A/C, but I know my car is still a stuffed pig.
Old 05-09-2010, 06:10 PM
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Hmmm, I was just searching and this came up. I've got a Taurus fan setup in mine too and bought the Meziere pump after just kinda "guessing" that it would fit. Those fans work wonderful for cooling, but mine developed a ticking sound so I think the motor is going on it. Looks like I'm gonna have to figure out something else.
Old 05-09-2010, 06:18 PM
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The Mezeire is thicker then the CSR so in my car it would have not fit my set up.
The Taurus Fan I bought was aftermarket replacement but brand new. $170.00 CDN , I didn't want to deal with a used one.
Old 05-09-2010, 06:43 PM
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That is friggin cool stuff ! I would have LOVED to see what my 8000 rpm LT4 (388ci) would have done in a light car like an rx7 !!!

you MUST post pics now that you have teased us with engine shots !! I wish I saw this post earlier but was going to say if you are running a EWP you can run a stronger timing chain or even a double roller. ANy standard SBC timing chain would work. The only reason LTX ones are specific is the built in water pump gearing which is REALLY heavy.

Car looks clean and glad the install worked for you. maybe next time I come down to MTL with the boys I'll see if you're out at any events I'd love to check that ride out !!

Forgot to add I dynoed my bolt on LT1 before and RIGHT after the install and I picked up 7 rwhp at peak only. The gains were liniear with rpms. so it's not something you will notice much. My LT4 build went 8000 and this pump will cavitate over 6500 rpms so that's why I went with an HD mezziere for that build.

Last edited by Nastyc4; 05-09-2010 at 06:50 PM.
Old 05-09-2010, 07:02 PM
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What mounting kit is in your car? I've got the Grannys in mine and my radiator looks to be mounted different as well. I know if I modify my brackets I can get another 1 1/2 to 2 inches by moving the radiator forward. I guess I should have measured before I pulled my engine. Either way I'm gonna run the Meziere and a double roller chain, so there may be some trimming of plastic.
Old 05-09-2010, 07:05 PM
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Originally Posted by Nastyc4
you MUST post pics now that you have teased us with engine shots !!


























































I just bought the LE2 package from Lloyd Elliot with a custom Camshaft and a ported intake , I should received it within the next weeks.
I don't think I'll be able to do this swap this summer but here's my current set up :



GM LT1 5.7 Litre.
JE SRP Forged Pistons (10.3:1 compression).
Manley Sportsman Forged Rods.
GM hotcam Kit (hotcam, LT4 springs, 1.6 Roller Rocker).
Aluminum heads.
Headman Headers to 2.5" Y into 3" N1 pipe to Magnaflow muffler.
Holley 255lph fuel pump.
MSD Ignition.
CSR Electric Water pump.
Ford Taurus V6 3.8L electric fan conversion.

Transmission T56
Fidnanza #12 flywheel.
SPEC 3 clutch Carbon Kevlar solid disk.
Abbott Electronic speedo converter.

Differential limited slip 4.10.


Suspension/Wheels

Tien HA Coilovers 16way adjustable with front/rear pillowballs.
Racing Beat DTSS Elims.
K2RD Rear Camber Adjuster.
Front STB.
5Zigen FN01R-C 17x8 225/45/17 Nitto NeoGen.
5Zigen FN01R-C 17x10 275/40/17 Nitto 555R Drag R.

Car weight with full interior ( March. 2010 ).
2888 Lbs.
Old 05-09-2010, 07:09 PM
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Originally Posted by WhiteHot
What mounting kit is in your car? I've got the Grannys in mine .

Same here.
Old 05-09-2010, 07:10 PM
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Originally Posted by mpcv2000





















































I just bought the LE2 package from Lloyd Elliot with a custom Camshaft and a ported intake , I should received it within the next weeks.
I don't think I'll be able to do this swap this summer but here's my current set up :



GM LT1 5.7 Litre.
JE SRP Forged Pistons (10.3:1 compression).
Manley Sportsman Forged Rods.
GM hotcam Kit (hotcam, LT4 springs, 1.6 Roller Rocker).
Aluminum heads.
Headman Headers to 2.5" Y into 3" N1 pipe to Magnaflow muffler.
Holley 255lph fuel pump.
MSD Ignition.
CSR Electric Water pump.
Ford Taurus V6 3.8L electric fan conversion.

Transmission T56
Fidnanza #12 flywheel.
SPEC 3 clutch Carbon Kevlar solid disk.
Abbott Electronic speedo converter.

Differential limited slip 4.10.


Suspension/Wheels

Tien HA Coilovers 16way adjustable with front/rear pillowballs.
Racing Beat DTSS Elims.
K2RD Rear Camber Adjuster.
Front STB.
5Zigen FN01R-C 17x8 225/45/17 Nitto NeoGen.
5Zigen FN01R-C 17x10 275/40/17 Nitto 555R Drag R.

Car weight with full interior ( March. 2010 ).
2888 Lbs.
Wow that car is sweet !! I actually had an 84 and 85 300zx turbo from that generation so I still love those generation japs. Tell me more about the swap and what is involved? How are you controlling the engine ecu wise? ALl the guages work etc? Is it a 5 speed in there? Whats the torque limit on those trannys if its a mazda one?

Damm, that car REALLY makes me want to attempt a swap in a generation like that. Do LS motors fit? I would imagine the lighter block (85 lbs or so) might help a bit to shave even more weight not to mention the slightly greater HP potential.

Also you if you dont mind me asking how much did you pay for the car?? you can pm me if you like. I'd be interested in something like that if it were ever up for sale !!
Old 05-09-2010, 07:43 PM
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Not to steal your thunder but I love this **** haha. Damn twins.






I'll just say I think he got a deal on that car. Granted it had some bugs that needed working out, but he got alot of real good parts on it. I paid pretty much what mine was worth ($7k) and he picked his up for less with more good stuff.
Old 05-09-2010, 08:22 PM
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Originally Posted by Nastyc4
Wow that car is sweet !!
Thanks , I'm really proud of it too.


Originally Posted by Nastyc4
Tell me more about the swap and what is involved?
Not much , engine cradle , trans support , custom driveshaft and labor.


Originally Posted by Nastyc4
How are you controlling the engine ecu wise?
Stock GM ECU

Originally Posted by Nastyc4
All the guages work etc?
Every thing is fully working in this car ( was not when I bought it ) .




Originally Posted by Nastyc4
Is it a 5 speed in there?
T56 ( 6 speed ) from a Z28



Originally Posted by Nastyc4
Do LS motors fit? I would imagine the lighter block (85 lbs or so) might help a bit to shave even more weight not to mention the slightly greater HP potential.
Most people do the LS swap now but I still think the LT1 fits better the 2nd Generation RX-7.

Originally Posted by Nastyc4
Also you if you dont mind me asking how much did you pay for the car?? you can pm me if you like. I'd be interested in something like that if it were ever up for sale !!

As of right now , price of the car , import fees , taxes + around 5K in misc. stuff including the LE2 "Lloyd Elliott" kit, I'm close to 13K CDN as of today.

Originally Posted by WhiteHot
I'll just say I think he got a deal on that car.

Oh yeah.....
Old 05-10-2010, 06:56 AM
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Originally Posted by fex77k
I had the same thing happen to my MSD Opti, it came apart on a dyno with less than 300 miles on it. Both the screw backed out on the rotor. That was a expensive lesson.
Erhhh yah same happened to me.


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