Brettspeed cast manifold with G30-660 - info thread
The following users liked this post:
EvilHoHo (07-09-2022)
The following users liked this post:
EvilHoHo (07-24-2022)
#103
Update :
One of the manifold setups is up and running . Results (virtual dyno) are not as good as I would hope but owner is very happy with how it drives . A few things are holding it back , (EDIT catalytic converter) tired engine, knockoff turbo , lack of EBC being the main ones.
Meanwhile I've discovered an issue with my setup that people need to be aware of. In the cold temps we are having atm (around 10C) there is a tendency for mild boost creep. Was going from 10 to 10.9 at 8000. I've got it under control now by cutting the EBC at around 7000 rpm. For most street setups this is highly unlikely to happen but could when exhaust is large and freeflow. Using the 1.01AR for a race setup should eliminate the possibility in that situation.
2nd and 3rd ...no boost cut
2nd and 3rd with 7000 boost cut
10psi 2nd gear virtual dyno
One of the manifold setups is up and running . Results (virtual dyno) are not as good as I would hope but owner is very happy with how it drives . A few things are holding it back , (EDIT catalytic converter) tired engine, knockoff turbo , lack of EBC being the main ones.
Meanwhile I've discovered an issue with my setup that people need to be aware of. In the cold temps we are having atm (around 10C) there is a tendency for mild boost creep. Was going from 10 to 10.9 at 8000. I've got it under control now by cutting the EBC at around 7000 rpm. For most street setups this is highly unlikely to happen but could when exhaust is large and freeflow. Using the 1.01AR for a race setup should eliminate the possibility in that situation.
2nd and 3rd ...no boost cut
2nd and 3rd with 7000 boost cut
10psi 2nd gear virtual dyno
Last edited by Brettus; 08-06-2022 at 07:19 PM.
The following 5 users liked this post by Brettus:
3toedSloth (07-19-2022),
AAaF (07-20-2022),
EvilHoHo (07-24-2022),
Fickert (07-19-2022),
jcbrx8 (07-18-2022)
The following users liked this post:
EvilHoHo (07-24-2022)
#105
Bending plastic sucks (Installing ducting). Haha. I'll let you know what happened this weekend. If the car survives, system is going on and I'll sort out the heat as we go. Those are good numbers! I'll be using non-counterfeit hardware and sticking as close to your recommendations at possible. Cheap parts already cost me once (Counterfeit NGK plugs) which ended with me getting towed off track when the electrode pretended to be an apex seal and exit stage right.
Last edited by EvilHoHo; 07-24-2022 at 09:30 PM.
#107
Good news...the ducting actually worked! Really well too! The air temps were about 107F and the car never saw anything above 208F while flogging at COTA.
Then...about a quart of oil flew out of somewhere and that ended my second day for the rest of the weekend. I'm still not sure where it's coming from but the oil definitely sprayed up and out over the windshield thru the hood vents with extreme efficiency...so I suppose I can check off the ducting as tested OK.
As soon as I get over my oil puddles pity party, I'll send off my spare keg to get rebuilt and studded. Then look under the hood to figure out what happened. Followed by fitting up the turbo system and finishing the fab work to get it in. Then swap the current oily mess for the rebuilt keg.
I'm not looking forward to any of it since I don't have a garage to work in and it's hot as hell right now. But the goal is to be back up by a Sept Track Night in America event so I can shake the car down. Next COTA attempt is in November.
Time to get back to margaritas for breakfast and contemplating if I want to unhitch the trailer yet.
Then...about a quart of oil flew out of somewhere and that ended my second day for the rest of the weekend. I'm still not sure where it's coming from but the oil definitely sprayed up and out over the windshield thru the hood vents with extreme efficiency...so I suppose I can check off the ducting as tested OK.
As soon as I get over my oil puddles pity party, I'll send off my spare keg to get rebuilt and studded. Then look under the hood to figure out what happened. Followed by fitting up the turbo system and finishing the fab work to get it in. Then swap the current oily mess for the rebuilt keg.
I'm not looking forward to any of it since I don't have a garage to work in and it's hot as hell right now. But the goal is to be back up by a Sept Track Night in America event so I can shake the car down. Next COTA attempt is in November.
Time to get back to margaritas for breakfast and contemplating if I want to unhitch the trailer yet.
#108
Well that's some good and not so good news ! How big is your catch can and it's hoses ?
Have a read of this whilst sipping your marg. : https://www.rx7club.com/3rd-generati...ce-car-792344/
After reading that I changed the design of my can and increased the size of the hoses coming to and from it. I've not managed to get any oil in it since!
Have a read of this whilst sipping your marg. : https://www.rx7club.com/3rd-generati...ce-car-792344/
After reading that I changed the design of my can and increased the size of the hoses coming to and from it. I've not managed to get any oil in it since!
Last edited by Brettus; 08-01-2022 at 10:19 AM.
#109
Catch can? Pfft...I have always vented to atmo and wipe the area down. This was definitely not related to that I believe. Oddly the dipstick was popped out, as if pressure pushed it out. When I revved white smoke came out of the filter that vents. Didn't see any oil squirting, but then I saw some oil dripping from above the eshaft down. Like it's under the intake manifold somewhere.
I suppose I should install a catch can based on your link as boost will need one.
I suppose I should install a catch can based on your link as boost will need one.
#111
Yeah I was thinking it's related. I just replaced the front seal. I don't think that was it. But I suppose I could double check. I was going to pull off the UIM and look around after I hose out the oil. What could have created so much pressure? How?
#112
There's no hose, just a filter that goes over the nipple with a clamp. Haha. Raw ******* the engine bay.
Yeah I was thinking it's related. I just replaced the front seal. I don't think that was it. But I suppose I could double check. I was going to pull off the UIM and look around after I hose out the oil. What could have created so much pressure? How?
Yeah I was thinking it's related. I just replaced the front seal. I don't think that was it. But I suppose I could double check. I was going to pull off the UIM and look around after I hose out the oil. What could have created so much pressure? How?
Doesn't matter if it was a filter or a hose , you are still tryig to force too much air through a 6mm hole(oil filler vent hole size). Is that where the filter is ?
Last edited by Brettus; 08-01-2022 at 03:23 PM.
#113
Yep. That's where the filter is. Oil filler vent hole.
#115
No respecter of malarkey
iTrader: (25)
or think it through to do it properly; the vent/oil flange on the middle iron is 1” ID or so. There are any number of better ways to divert to a catch can, including cutting the section to the oil filler cap off and clamping a silicone tee there instead with the tee going to a catch can with a large diameter tube/hose.
small hoses/holes = higher velocity and greatly increases carrying oil where you don’t want it to go.
.
small hoses/holes = higher velocity and greatly increases carrying oil where you don’t want it to go.
.
Last edited by TeamRX8; 08-01-2022 at 04:25 PM.
#118
or think it through to do it properly; the vent/oil flange on the middle iron is 1” ID or so. There are any number of better ways to divert to a catch can, including cutting the section to the oil filler cap off and clamping a silicone tee there instead with the tee going to a catch can with a large diameter tube/hose.
small hoses/holes = higher velocity and greatly increases carrying oil where you don’t want it to go.
.
small hoses/holes = higher velocity and greatly increases carrying oil where you don’t want it to go.
.
#120
No respecter of malarkey
iTrader: (25)
:facepalm:
how about buying a tee the same color as that section of the manifold, with the tee section facing to the rear, run the hose underneath the UIM back to the firewall, and then over to the catch can? (would need to verify, just by memory).
you know I got rid of that entire underneath part of the UIM on my NA setup, right?
.
Last edited by TeamRX8; 08-01-2022 at 08:23 PM.
#121
#122
No respecter of malarkey
iTrader: (25)
there are any number of ways to handle it, but for me to choose the easy way for the average forum bear to address it; a common response when presenting what would be the more elegant or preferred method in my own mind’s eye, is not exactly a shocker.
more than happy to come down and lend a hand or two.
.
more than happy to come down and lend a hand or two.
.
#123
Registered
iTrader: (2)
:facepalm:
how about buying a tee the same color as that section of the manifold, with the tee section facing to the rear, run the hose underneath the UIM back to the firewall, and then over to the catch can? (would need to verify, just by memory).
you know I got rid of that entire underneath part of the UIM on my NA setup, right?
.
how about buying a tee the same color as that section of the manifold, with the tee section facing to the rear, run the hose underneath the UIM back to the firewall, and then over to the catch can? (would need to verify, just by memory).
you know I got rid of that entire underneath part of the UIM on my NA setup, right?
.
#124
Registered
Evil,
Just as another thought. I was having a similar issue, dipstick popping, but no significant oil rejection...so perhaps not as bad as yours. I upgraded to a Mishimoto CC w/larger ports and larger venting lines ...from 5/16" IIRC to 10AN. Haven't had an issue since. Pre and post pics below.
Though it sounds like you may need even more venting flow capacity than this.
Pre:
.
Post:
Just as another thought. I was having a similar issue, dipstick popping, but no significant oil rejection...so perhaps not as bad as yours. I upgraded to a Mishimoto CC w/larger ports and larger venting lines ...from 5/16" IIRC to 10AN. Haven't had an issue since. Pre and post pics below.
Though it sounds like you may need even more venting flow capacity than this.
Pre:
.
Post:
Last edited by jcbrx8; 08-02-2022 at 06:38 PM.
The following users liked this post:
EvilHoHo (08-02-2022)
#125
No respecter of malarkey
iTrader: (25)
went back and looked and what I suggested likely won’t work. Because I was thinking the oil fill tube was round the last length of it, but the intake nipple doesn’t go straight in. It runs down the length, and protrudes out from the side, of round fill tube part. There are alternatives, but anyone who wants to discuss it should send me a pm or email.
Largest possible venting line is the answer though.
.
Largest possible venting line is the answer though.
.
Last edited by TeamRX8; 08-02-2022 at 12:35 PM.