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-   -   94 R2 N/A 3 Rotor Build (https://www.rx7club.com/build-threads-292/94-r2-n-3-rotor-build-975382/)

GtoRx7. 10-07-14 01:33 PM


Originally Posted by TwinCharged RX7 (Post 11812085)
Sorry, you are right, the work itself is very professional and the fab work is second to none.

I've been spending too much time on speedhunters where most features are really above and beyond (i.e. braided lines, AN fittings, no zip ties, tucked wiring, etc). I do realize not all of that is necessary. My comment was more based on how long this build seems to have taken vs that level of finish.

Instead of "professional", I really meant "OEM" fit and finish. But that is really none of my business and as the OP stated, there are many reasons for that , and the fault (or whatever one wants to call it) is not the shop itself.

A mod can delete my comment if you'd like. It wasn't really meant to be a stab at defined.

I think maybe everything is too monochromatic and purposely hidden. Ill take better photos during the day. All the lines are black braided with black an fittings. There is actually only one rubber line for the block coolant vent. Cooling system is all hard piping with quick disconnects. Two zip ties hold the heater hose because Adel clamps would be more intrusive and noticable. And it's not 100 percent finished either. I always wait till it runs before final touches. If the engine bay was body shop painted easily be speedhunters level. I'm not trying to argue or anything but the things that took the longest are not even seen. Fab takes time as you personally know. For the budget of this build it's far above and beyond.

Rxmfn7 10-07-14 04:19 PM

^ Oh, and it runs now. Logan forgot to mention that :p:

David Hayes 10-07-14 04:40 PM

What? Videos or it is not true :)

Rxmfn7 10-07-14 04:44 PM

I have been sent a short cell phone video just for proof haha. Ill post when we have something a little more.. "professional" ;)

David Hayes 10-07-14 04:45 PM

Not acceptable!! We demand "proof of life"!

Looking forward to videos :)

Rxmfn7 10-09-14 05:16 PM

Click to view video. For some reason I cant embed it.

http://i254.photobucket.com/albums/h...h_GOPR0009.mp4

David Hayes 10-09-14 06:34 PM

That sounds so nice. Great job Logan. Lenny you must be very happy. I know I am for you :)

t-von 10-09-14 06:47 PM

They should bottle up 1st start moments (especially from long time projects). Sounds good!

papsmagu 10-09-14 06:57 PM

Soooooo sweet,,,,,,,,congrats

bzwigart 10-09-14 07:09 PM

Bring it out to cars & coffee next spring. Would love to see it!!!

Rxmfn7 10-09-14 07:20 PM

^ Definitely :) Car will be out every chance I get.

Rxmfn7 10-09-14 08:16 PM

Ill be happier when its in my garage :p But yes, its been a long road and its great to actually see the car run and be able to move under its own power for the first time in years. Seeing her screaming on the dyno will be a great day.


Originally Posted by David Hayes (Post 11813683)
That sounds so nice. Great job Logan. Lenny you must be very happy. I know I am for you :)


ultimatejay 10-09-14 09:21 PM

I would shoot myself before waiting 4 years to finish an engine- Geeez

Rxmfn7 10-10-14 07:08 PM

^ Glad it didnt come to that. Lots of relaxation exercises ;). Love your car btw! :bigthumb:

David Hayes 10-11-14 06:54 AM

Good stuff fur sure. Now we demanding bystanders want some videos of the car on the dyno!

One recommendation for you would be to have Logan build a shroud for the radiator and then center the fan. If you did this, I believe you'd increase your cooling efficiency by a good bit. As it stands now, the fan is only servicing a small portion of the radiator. Food for thought.

Love this car and look forward to seeing it in person.

GtoRx7. 10-11-14 12:17 PM


Originally Posted by David Hayes (Post 11814272)
Good stuff fur sure. Now we demanding bystanders want some videos of the car on the dyno!

One recommendation for you would be to have Logan build a shroud for the radiator and then center the fan. If you did this, I believe you'd increase your cooling efficiency by a good bit. As it stands now, the fan is only servicing a small portion of the radiator. Food for thought.

Love this car and look forward to seeing it in person.

I totally understand the direction of thought on that but this method I've proven, even on my 4 rotor going non stop for a hour racing. If a radiator is large enough and ducting inlet/outlet aspect ratios proper, the fan is actually a restriction at any speed. It should take up the smallest footprint needed just to cool while stationary. If it were shrouded it would improve stationary cooling and dramatically hurt airflow everywhere else. These radiators are so awesome though even in traffic lenny might actually hear the fan once in his life lol.

Christopher W. 10-11-14 07:39 PM

Good Stuff Logan....and Lenny!! I can't tell you how happy I am for you to get your car...

My epic tale to continue as well. ;)

t-von 10-12-14 07:58 PM


Originally Posted by GtoRx7. (Post 11814409)

I totally understand the direction of thought on that but this method I've proven, even on my 4 rotor going non stop for a hour racing. If a radiator is large enough and ducting inlet/outlet aspect ratios proper, the fan is actually a restriction at any speed. It should take up the smallest footprint needed just to cool while stationary. If it were shrouded it would improve stationary cooling and dramatically hurt airflow everywhere else. These radiators are so awesome though even in traffic lenny might actually hear the fan once in his life lol.


That's a very good point and something I never even thought about. I personally have twin spal fans and I could easily just separate the assembly. I may experiment with that next summer when the temps reach 100 again to see its effectiveness. Plus one less fan would eliminate the extra electrical load. :)

TwinCharged RX7 10-12-14 08:53 PM

What radiators are you using? I'd like to keep them in mind for the next project.

Regarding the oil tank for the dry sump ... I actually like where it is. If you do want to move it later on, have you ever though about that space between the rear subframe and fuel tank? I was thinking about that but not sure if the oil pump needs the reservoir above it for gravity purposes.

Mdessouki 10-12-14 10:37 PM

Its an old nascar C&R radiator. Plenty of them on eBay, but most are way too big to fit between the frame rails.

David Hayes 10-13-14 06:44 AM


Originally Posted by GtoRx7. (Post 11814409)
I totally understand the direction of thought on that but this method I've proven, even on my 4 rotor going non stop for a hour racing. If a radiator is large enough and ducting inlet/outlet aspect ratios proper, the fan is actually a restriction at any speed. It should take up the smallest footprint needed just to cool while stationary. If it were shrouded it would improve stationary cooling and dramatically hurt airflow everywhere else. These radiators are so awesome though even in traffic lenny might actually hear the fan once in his life lol.

Thanks for the info Logan. Hadn't thought through the radiator being a monster size like it is. I'd say the perfect solution if you are not using that large of a radiator would be to have a shroud that has rubber flaps on it to allow air to pass at speed? This way you can get the benefits of the fan working to pull air from the entire radiator at stop or low speeds and then allow air to pass at speed.

I know a lot of the Spal dual fan setups come this way but the flaps are not very large.

RENESISFD 10-13-14 06:52 AM

The flaps need to be small so they can effectively seal up the back of the shroud. Too big and they will be to heavy. My Spal shroud has a lot of those flaps.

David Hayes 10-13-14 06:58 AM

^ Gotcha. Should have looked at my Spal fan unit before posting but I can't as the car is never here :) I seem to recall now a lot of little flaps on the back of the dual unit. Maybe 6 to 8? I guess if you were industrious enough you could put some more in as well if needed?

My temps have always been on the high side, no matter what radiator I had, hence the recent conversion to v-mount. I think Pettit stated my first radiator on the car was a Nascar one, but it didn't work well, at least not with the front mounted intercooler. That's one think Lenny doesn't have to worry about.

t-von 10-13-14 11:18 PM

Don't forget David that the water pump is just as important. The 2nd gen Rx7 and cosmo pumps move more water. My setup started out with an oem fd water pump. As soon as I modified the 20b's pump to fit my fd style accessories, I notice my 20b taking longer to warm up. Plus when it got hot from me not turning my fans on, the temps dropped quickly was soon as they were switched on.

RENESISFD 10-14-14 06:20 AM

^ Do you run a thermostat? If so there should be no difference in warm up time as more water is just circulated through the block.


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