Build Thread (FE3, RX7 TII, EFR 6258, MS3) - Page 24 - Miata Turbo Forum - Boost cars, acquire cats.

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Old 08-25-2014, 04:52 PM   #461
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Quote:
Originally Posted by yank View Post
and hopefully be ready to tune by Thursday or Friday. Pull videos to follow..
aww c'mon man, we need updates

getting blue ***** over here
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Old 08-27-2014, 03:32 AM   #462
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yank,

do you have any pictures of the V band welding to the EFR turbo you did??
id really like to see this.

thanks
Yes its on the server at work. I'll try to post it up tomorrow.



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Build Thread (FE3, RX7 TII, EFR 6258, MS3)-img_6212_zpsd6d1d0c5.jpg   Build Thread (FE3, RX7 TII, EFR 6258, MS3)-img_6211_zps90b5301a.jpg  

Last edited by yank; 08-27-2014 at 06:38 PM. Reason: added pics
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Old 08-27-2014, 03:35 AM   #463
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Quote:
Originally Posted by concealer404 View Post
I need to go back and read this thread again... i have an F2 block with FE3 crank, B2600 rods, and F2 pistons chucked together in the name of science sitting on my garage floor.

Any thoughts from driving it so far as to how the change in rod:stroke ratio is showing itself in driving characteristics? This should be close to 2:1, right? 1.9xx?
Sweet. I'm curious to see your results. Rod:stroke ratio on the new setup is 1.8 at 155mm rods and 86mm stroke using the stock crank.
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Old 08-27-2014, 03:46 AM   #464
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Originally Posted by 18psi View Post
aww c'mon man, we need updates

getting blue ***** over here
Alright so i did in fact get on the dyno for a couple hours after work the other day. Still not polished out 100% but the curve and its potential can definitely be seen. I'll try to post up a log file tomorrow as well for those with megalog viewer.

Currently putting down 305hp and 280ftlb torque at 14 psi. The best part is where the torque comes in and how long it holds...

If compared to the old graph (note: scaled differently but max revs should be close to the same) there are gains from 75 to 90 ft lb torque low end. You can definitely feel it.



Old graph on 17 psi and spent engine. (low compression cylinder 2 and different exhaust manifold. rolling coal.)





Erich, the tuner at PRE says he can potentially get close to 400 out of the current setup depending on if it likes more boost on pump gas but i'm thinking 350 is a safer bet on pump and then if i get a wild hair i'll go to 400ish on e85. I'll need to drop close to 8K on wheels, tires, brakes and body at that point though.

As far as ripper videos i'm sorry but the best i can do for now is hard single gear pulls. The rx7 TII trans doesn't seem to be going into gear easily between shifts. At a stand still the car moves slightly at the gate which makes me think its a pressure plate disengagement issue instead of a lubrication issue (act HD) but i'm considering a redline trans fluid change in hopes that its just that simple. Got a quote on a twin disk clutch from clutch masters today... 1700$

If fluid doesn't work i have an OE Kia Sportage PP in a box i can try but that's alot of work just to diagnose an issue.
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Build Thread (FE3, RX7 TII, EFR 6258, MS3)-highcompfe3t14psiunfinished_zpscbdbb0df.jpg   Build Thread (FE3, RX7 TII, EFR 6258, MS3)-1072342_10100941105045152_703713349_o_zpsca512768.jpg  

Last edited by yank; 08-27-2014 at 04:00 AM. Reason: More info
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Old 08-27-2014, 08:17 AM   #465
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I'm kind of surprised you're not making 250ftlbs by 3k rpms. But I guess you started the pull kind of late for that.
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Old 08-27-2014, 08:53 AM   #466
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Your torque curve moved left 1,000 rpm and is hanging in there. Nice. I think this looks very promising for a preliminary tune. What's the timing on this pull?

Last edited by m2cupcar; 08-28-2014 at 04:50 PM.
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Old 08-27-2014, 10:07 AM   #467
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Very nice!

Its so flat from 4-7, must be a delight. I kinda agree wtih leafy in that I would expect it to spool even sooner, but you're on pump and likely very conservative timing, on corn and with proper timing I bet this thing would be nuts.

Either way, your car must be a hoot
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Old 08-27-2014, 10:24 AM   #468
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Quote:
Originally Posted by yank View Post
Alright so i did in fact get on the dyno for a couple hours after work the other day. Still not polished out 100% but the curve and its potential can definitely be seen. I'll try to post up a log file tomorrow as well for those with megalog viewer.

Currently putting down 305hp and 280ftlb torque at 14 psi. The best part is where the torque comes in and how long it holds...

If compared to the old graph (note: scaled differently but max revs should be close to the same) there are gains from 75 to 90 ft lb torque low end. You can definitely feel it.


Old graph on 17 psi and spent engine. (low compression cylinder 2 and different exhaust manifold. rolling coal.)





Erich, the tuner at PRE says he can potentially get close to 400 out of the current setup depending on if it likes more boost on pump gas but i'm thinking 350 is a safer bet on pump and then if i get a wild hair i'll go to 400ish on e85. I'll need to drop close to 8K on wheels, tires, brakes and body at that point though.

As far as ripper videos i'm sorry but the best i can do for now is hard single gear pulls. The rx7 TII trans doesn't seem to be going into gear easily between shifts. At a stand still the car moves slightly at the gate which makes me think its a pressure plate disengagement issue instead of a lubrication issue (act HD) but i'm considering a redline trans fluid change in hopes that its just that simple. Got a quote on a twin disk clutch from clutch masters today... 1700$

If fluid doesn't work i have an OE Kia Sportage PP in a box i can try but that's alot of work just to diagnose an issue.


Wow looks great!

I have the same problem with the clutch/trans on our Miata. I've bled the brand new hydraulics enough times i could scream, spent hours messing around with the pedal adjustment, and even with it adjusted out as far as it will go without slipping, it still creeps forward at a stop and doesn't shift real nice in the lower gears.

Hoping it all holds together long enough to scrape together money for a 5spd and a 949 clutch to replace this 5spd and FM clutch.
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Old 08-27-2014, 06:13 PM   #469
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Quote:
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Yes its on the server at work. I'll try to post it up tomorrow.
Awesome thank you!
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Old 09-03-2014, 01:42 AM   #470
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Love this build thread
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Old 09-19-2014, 12:35 AM   #471
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Did a PCA autocross the other day. Everything is operating well. I was extremely limited with 205 Nitto Neogens but it was fun to skate around regardless. Ended up pulling out 5psi and still was rolling them over in the short straights.
see youtube.

I'm on the hunt for an M3 E46 6 speed manual and a car payment. No more of this racecar DD stuff. I'm over it. This means a diet and new go fast plans for the Miata.

Last edited by yank; 11-10-2016 at 02:43 AM.
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Old 09-19-2014, 02:14 AM   #472
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my god that sounds sweet coming into spooling!
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Old 09-19-2014, 08:02 AM   #473
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I really should turn up the boost so mine makes those noises.
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Old 09-19-2014, 10:03 AM   #474
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Quote:
Originally Posted by yank View Post
Did a PCA autocross the other day. Everything is operating well. I was extremely limited with 205 Nitto Neogens but it was fun to skate around regardless. Ended up pulling out 5psi and still was rolling them over in the short straights.



I'm on the hunt for an M3 E46 6 speed manual and a car payment. No more of this racecar DD stuff. I'm over it. This means a diet and new go fast plans for the Miata.
oh my!!!
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I really should turn up the boost so mine makes those noises.
coolstorybro.jpeg
we'll see it when it happens.
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Old 09-19-2014, 10:06 AM   #475
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coolstorybro.jpeg
we'll see it when it happens.
I did receive the 4 port boost controller I ordered with random money in my paypal. So now my only reason is laziness.
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Old 10-29-2014, 01:47 AM   #476
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Transmission mounts finally done. Hope to get the driveshaft to the machine shop today and then ill be working on coolant reroute stuff. drilling tapping the head etc..


Wtf did you use the intake manifold brace as a tranny crossmember?!
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Old 10-29-2014, 09:40 AM   #477
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That's the stock rx7 tII R transmission support arm.
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Old 10-29-2014, 09:48 AM   #478
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I forget, did either of you guys with this mount weld spreader plates to the trans tunnel in the passenger compartment for them. That sheet metal is awfully thin, would suck for the mount to tear off the body.
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Old 10-30-2014, 01:20 PM   #479
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from this thread, post 60, mighty mouse said:

Quote:
The metal on the trans tunnel is double walled, so you can put some heat into it. The floorboards however are not.
I was under the impression a spreader plate was typically used in hardware applications like a bolt in cage or harness. But I get your point, I just think it's as thin as you thought where the mounts are being welded.
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Old 11-24-2014, 12:31 PM   #480
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Yes it was super thin. If i had to do it again i'd make a bolt in brace that would be connected to the frame rails. that way if you bail on the project you can always go back to the 1.6 stuff. DC2696 has the right idea. He was able to swap back to the 1.6L setup in <12 hours after he popped his FE3 at Laguna seca.
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