GTUs 20B N/A Build Thread

nate · 11-26-2010, 12:52 AM

Its so inspirational to see builds this perfect.

GtoRx7 · 12-24-2010, 02:55 PM

Have some more pics of the building process. We had to move the engine 1.75" further back into the chassis to make room for the large radiator and a/c. Started with a stock transmission mount, cut and fabricated a new structure onto it. Then, had our driveshaft shop shorten the driveshaft 1.75". Since the shifter would no longer line up, we used a 1st gen shift tower and modified the shift rod. This puts it very close to stock location.

Then built a oil pedestal bracket, and bolted the assembly to the shock tower. The pedestal will allow us to have twin -8an feed lines to front and rear of the block. We have found through racing that this is a desired modification.

Next was time to mock up the radiator and condenser, as well as the oil cooler. We relocated and fabricated the fill neck on the radiator to give additional hood clearance. Machined spacers were made, and the condenser bolts onto the radiator. Once the ideal locations were found, a subframe that holds both was fabricated. The subframe bolts onto the car, so no welding on the chassis would be required. This will be a quick release setup similar to my track car. The radiator, oil cooler, and condenser will be able to be removed in minutes from the top.

gmonsen · 12-24-2010, 03:51 PM

Logan... This is absolutely the best FC in the country. Interesting that you had to move the engine back, but it looks like it all worked out well.

(Let's talk next week. I'm a go on the headers...)

Gordon

GtoRx7 · 12-24-2010, 04:13 PM

Quote:

Originally Posted by gmonsen

Logan... This is absolutely the best FC in the country. Interesting that you had to move the engine back, but it looks like it all worked out well.

(Let's talk next week. I'm a go on the headers...)

Gordon

Thanks Gordon, its nice to work with such a clean example of a FC! Sounds good, talk to you soon

Christopher W. · 12-26-2010, 01:53 AM

Hey Logan, updates like these are by far my favorite Christmas present..

I dig the new oil pedestal. I now see exactly what you were talking about with the radiator mount.

Logan can you snap another picture directly from the side. I want to see how much more room is left between engine and firewall..

Merry Christmas Gordon - cool new ideas going into your car.

I don't know if we would have had to of move the engine back if not for (Logan can correct me if I am wrong) the fact that we are using Nextel radiator and oil cooler plus the stock ac condenser. The oil cooler is of a design I was not familiar with....nothing like a stock FC oil cooler. It looks more like a large flat yet thin radiator. I don't believe cooling is going to be an issue. Plus I am really excited about the engine moving back. I would not of minded a couple or more inches if the shifter could have been addressed properly.

GtoRx7 · 12-28-2010, 07:06 PM

More pics, had to upload some more. Final shot of the radiator/oil cooler bolt on subframe. Next step will be getting it powder coated

Radiator and oil cooler placed into subframe. Now time to construct the upper quick release bracket. It will double as a cooling panel too

And Chris, here is the pics you requested. The 20b intake is narrower than the ITB setup we will be building. But you can see not much more room left to go back.

Christopher W. · 12-28-2010, 08:59 PM

Wow!!

It is so strange to have been so hands on with my car for so long. I lived for getting it to the state you received it in and now to be just watching from the wayyyy back seats.

It is awesome seeing that intake in my engine bay. I know it will not be there.. Something way more exciting (ITBs) will be but I have been dreaming about a three rotor in a FC since about 1997.

Oh, Logan, what about the hood latch. Do you think we can still use it or are we going to need to go to hood pins??

11-26-2010, 12:52 AM	#1
nate Not a fan of rust... Join Date: Apr 2010 Location: Chicagoland! Posts: 4 Rep Power: 0	Its so inspirational to see builds this perfect. __________________ 88 vert 87 SE

12-24-2010, 02:55 PM	#2
GtoRx7 Rotary Fanatic Join Date: Jul 2008 Posts: 151 Rep Power: 18	Have some more pics of the building process. We had to move the engine 1.75" further back into the chassis to make room for the large radiator and a/c. Started with a stock transmission mount, cut and fabricated a new structure onto it. Then, had our driveshaft shop shorten the driveshaft 1.75". Since the shifter would no longer line up, we used a 1st gen shift tower and modified the shift rod. This puts it very close to stock location. Then built a oil pedestal bracket, and bolted the assembly to the shock tower. The pedestal will allow us to have twin -8an feed lines to front and rear of the block. We have found through racing that this is a desired modification. Next was time to mock up the radiator and condenser, as well as the oil cooler. We relocated and fabricated the fill neck on the radiator to give additional hood clearance. Machined spacers were made, and the condenser bolts onto the radiator. Once the ideal locations were found, a subframe that holds both was fabricated. The subframe bolts onto the car, so no welding on the chassis would be required. This will be a quick release setup similar to my track car. The radiator, oil cooler, and condenser will be able to be removed in minutes from the top. __________________ DEFINED AUTOWORKS Where concept meets results Black 1994 FD 4-rotor 610rwhp all motor Red 1970 Mazda R-100 with 10a Black 1974 Mazda Rx4 Black 1984 Gsl-SE 13b-re streetport 230rwhp

12-24-2010, 03:51 PM	#3
gmonsen The Ancient One Join Date: Mar 2008 Location: Eastern Pennsylvania Posts: 144 Rep Power: 18	Logan... This is absolutely the best FC in the country. Interesting that you had to move the engine back, but it looks like it all worked out well. (Let's talk next week. I'm a go on the headers...) Gordon __________________ 1993 Rx7 R1 20b NA 1994 Rx7 20b supercharged project 1991 BMW 850 6 speed 1991 BMW E30 M3 Evo II

12-28-2010, 07:06 PM	#6
GtoRx7 Rotary Fanatic Join Date: Jul 2008 Posts: 151 Rep Power: 18	More pics, had to upload some more. Final shot of the radiator/oil cooler bolt on subframe. Next step will be getting it powder coated Radiator and oil cooler placed into subframe. Now time to construct the upper quick release bracket. It will double as a cooling panel too And Chris, here is the pics you requested. The 20b intake is narrower than the ITB setup we will be building. But you can see not much more room left to go back. __________________ DEFINED AUTOWORKS Where concept meets results Black 1994 FD 4-rotor 610rwhp all motor Red 1970 Mazda R-100 with 10a Black 1974 Mazda Rx4 Black 1984 Gsl-SE 13b-re streetport 230rwhp

12-26-2010, 01:53 AM	#5
Christopher W. Rotary Fan in Training Join Date: Mar 2008 Posts: 98 Rep Power: 18	Hey Logan, updates like these are by far my favorite Christmas present.. I dig the new oil pedestal. I now see exactly what you were talking about with the radiator mount. Logan can you snap another picture directly from the side. I want to see how much more room is left between engine and firewall.. Merry Christmas Gordon - cool new ideas going into your car. I don't know if we would have had to of move the engine back if not for (Logan can correct me if I am wrong) the fact that we are using Nextel radiator and oil cooler plus the stock ac condenser. The oil cooler is of a design I was not familiar with....nothing like a stock FC oil cooler. It looks more like a large flat yet thin radiator. I don't believe cooling is going to be an issue. Plus I am really excited about the engine moving back. I would not of minded a couple or more inches if the shifter could have been addressed properly.

12-28-2010, 08:59 PM	#7
Christopher W. Rotary Fan in Training Join Date: Mar 2008 Posts: 98 Rep Power: 18	Wow!! It is so strange to have been so hands on with my car for so long. I lived for getting it to the state you received it in and now to be just watching from the wayyyy back seats. It is awesome seeing that intake in my engine bay. I know it will not be there.. Something way more exciting (ITBs) will be but I have been dreaming about a three rotor in a FC since about 1997. Oh, Logan, what about the hood latch. Do you think we can still use it or are we going to need to go to hood pins??