Single Turbo RX-7's Questions about all aspects of single turbo setups.

Any body have Gotham's turbos kit?

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Old 10-22-04, 06:04 PM
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Question Any body have Gotham's turbos kit?

So does anyone have gotham's turbo kits? What do you think about them? Im looking at getting a ball bearing kit or just turbo. Ive been looking at the GT40R or the GT42. I hear that the 85R is a pretty popular kit wright now. Does that have alot of lag?
Old 10-22-04, 07:28 PM
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I would say at this moment A-specs 35R sale is the best buy on ball bearing kits. It was mentioned in another thread in here in the single section.
Old 10-22-04, 07:34 PM
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Found it for you.

https://www.rx7club.com/single-turbo-rx-7s-23/going-single-turbo-wheres-whos-best-vendors-kits-etc-359786/
Old 10-22-04, 09:13 PM
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I have Gotham's Gr67 kit, but I am still in the break -in period with my motor. I would suggest calling the shop if you get a chance. 817-788-8726 Tell whoever u speak to that Chris from Jersey referred you.
Old 10-23-04, 02:19 AM
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I will be talking to the guys at gotham on monday. that is when my engine is supposed to be there. i will make it a point to talk to them about there kits.
Old 10-23-04, 09:29 AM
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Just F.Y.I-- Gotham is open on saturday also.
Old 10-23-04, 01:30 PM
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post your dyno sheets!


Originally Posted by cripsr6
I have Gotham's Gr67 kit, but I am still in the break -in period with my motor. I would suggest calling the shop if you get a chance. 817-788-8726 Tell whoever u speak to that Chris from Jersey referred you.
Old 10-23-04, 10:17 PM
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that would be great to see some dyno sheets cripsr6

what port do you have
Old 10-24-04, 05:18 PM
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Im have a streetport, and will post my dyno results as soon as possible.
Old 10-24-04, 05:27 PM
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joe (kyro-2) also has a turbo kit from gotham. you can talk to him also.
Old 10-24-04, 05:35 PM
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Joe should post his dyno sheets!


Originally Posted by vel525
joe (kyro-2) also has a turbo kit from gotham. you can talk to him also.
Old 10-24-04, 06:16 PM
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joe made 410 @19 psi (I think)
Old 10-24-04, 07:13 PM
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how come one of their turbo kits (i forgot which one) has 2 wastegates?
Old 10-24-04, 07:36 PM
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to increase cost

really though..... if they wanted to keep the two runners seperate for a divided flange it could increase flow as they are not "joined" earlier.

I'd love to see comparisons.

I personally would just go with a larger wg as i'm poor. I don't think it's realated to the wg itself just the manifold and the design. The dual wg was a by product.

It could be argued that two is better than one right?
Old 10-24-04, 07:50 PM
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Originally Posted by modrx7
joe made 410 @19 psi (I think)
That sucks! Pretty weak especially for a ported engine. I'd rather keep the stock twins.
Old 10-24-04, 08:18 PM
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Originally Posted by Sesshoumaru
to increase cost

really though..... if they wanted to keep the two runners seperate for a divided flange it could increase flow as they are not "joined" earlier.

I'd love to see comparisons.

I personally would just go with a larger wg as i'm poor. I don't think it's realated to the wg itself just the manifold and the design. The dual wg was a by product.

It could be argued that two is better than one right?
Dual wastegates are mainly for keeping the manifold truly divided which can have benifits of it's own you can get better control as well. I'm sure Gotham thought of both things when designing it.
Old 10-24-04, 08:32 PM
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I believe it is there GR63 kit that has 2 wg
Old 10-24-04, 08:34 PM
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Why such low #'s on the dyno? With a ported motor you should have mad much more than that. I better make really good #'s with my car
Old 10-25-04, 01:16 AM
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Originally Posted by Zero R
Dual wastegates are mainly for keeping the manifold truly divided which can have benifits of it's own you can get better control as well. I'm sure Gotham thought of both things when designing it.
yeah i mentioned the divided part but i dont' think the wg control should be much of an issue. A larger 50mm can control large amounts of power easily.

that's why i'm curious how divided/undivided spool differently on the manifold. Is the manifold better? I don't know. Anyone want to comment that has used it? I don't think there are too many of those though.........
Old 10-27-04, 04:29 AM
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Originally Posted by modrx7
joe made 410 @19 psi (I think)
Incorrect, He made 436 at 17psi with ambient room temperature over 100 degrees massive heatsoak,and a motor losing compression VERY quickly due to a completely failed OMP while tuning. Also a conservative tune because it was tuned in the south, when joe lives in chicago with crazy wheather
Old 10-27-04, 04:37 AM
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Originally Posted by Comptech
I believe it is there GR63 kit that has 2 wg
correcto mundo
Old 10-27-04, 09:18 AM
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post the dyno sheet ! id love to see it as others here would too


it must be a really weak 436rwhp as Christians GT35R on a weak compreession stock engine seems to hold its own against it.. christians probably making 350rwhp in his car, if that...ohh chicago cruises.. maybe christian can chime in?



Originally Posted by Rx-7$4$me
Incorrect, He made 436 at 17psi with ambient room temperature over 100 degrees massive heatsoak,and a motor losing compression VERY quickly due to a completely failed OMP while tuning. Also a conservative tune because it was tuned in the south, when joe lives in chicago with crazy wheather
Old 10-27-04, 09:21 AM
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did Christian ever race Joe on the highway a couple of times, what happened?



Originally Posted by Rx-7$4$me
Incorrect, He made 436 at 17psi with ambient room temperature over 100 degrees massive heatsoak,and a motor losing compression VERY quickly due to a completely failed OMP while tuning. Also a conservative tune because it was tuned in the south, when joe lives in chicago with crazy wheather
Old 10-27-04, 10:19 AM
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Originally Posted by Poweraxel
did Christian ever race Joe on the highway a couple of times, what happened?
they had two runs. they split one each. maybe sunday they can get in a few more runs!!
Old 10-27-04, 10:29 AM
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Sounds like someone is being mislead somwhere, maybe the moon wasn't in proper alignment with the planets on that day as well???????


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