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I just received this manifold and was a bit disappointed to see the pipe diameter vs the flange. Anyone have any opinion on the effect this may have or is it not of any consequence? For an EFR conversion..
Laser cut flange to suit the port and using 1.5" steam pipe inevitably results in a mismatch.
More expensive way around it, is to do what the japanese did on some older manifolds, split and re weld the pipe from the flange. Others use a less labour intensive method of machining the entire flange to achieve the taper.
If it bothers you, could get a die grinder in there and smooth out the worst of the edges. SDR?
Yes, SDR, I needed a steel manifold for the targa rules but I am moving away from that idea as they are about to introduce even more rules (read cost) so I could probably just get a cast manifold if that is the case. I don't think die grinding will help without weakening it.
Sounds like a real shitfight on the way reading the speedcafe article a couple of days ago.
If you wanted to use it, looks like it's a few mm inside the flange, so shouldn't weaken if you just use the burr to break the edges and a a flap roll to blend a bit?
For competition use, personally I'd opt for cast over fabbed any day. A warped turbo flange or blown gasket on day 4 or 5 would have you hating yourself if spending thousands on entry and prep.
What's the speedcafe article? I was not able to find anything cast that wasnt stainless (illegal for some irrational reason or another) This thing also has weld spatter that needs honing out, it would end up going through the turbo it you weren't paying attention.
Yes, SDR, I needed a steel manifold for the targa rules but I am moving away from that idea as they are about to introduce even more rules (read cost) so I could probably just get a cast manifold if that is the case. I don't think die grinding will help without weakening it.
The rules let you EFR swap it but a cast stainless manifold is where the problems at?
Oh you mean about Targa, yeh from what I get so far the GT3 was allowed to participate of the shelf. It appears they snap oversteered into a tree and they are blaming the stock suspension for not being set up for a road course, they are going to try and have all cars inspected and someone sign off on their suspension set ups (which means liability which means money if at all) amongst other things. Its a bit of joke when you get into it but alot of the rules make no sense as it is. This has put my plans in a bit of spin, I have a 7670 on the way which was on the approved stock twin replacement list. I would prefer an 8374 otherwise so cast manifold and another turbo maybe on the cards before I've even begun..
The rules let you EFR swap it but a cast stainless manifold is where the problems at?
Yes I asked them what the purpose of the rule was but they wouldn't have a bar of it, just said do it or don't come.They weren't interested to know about all the cars running stock stainless manifolds.
Bit laughable about GT3s being unsuitable, they're used in Europe for this purpose. They make it sound like the bloke was doing his first targa, when he's been entering for years....and as a local, probably practicing bloody stages each week.
Which regs, targa or aasa, I'd like to have a look? Nothing exotic in SS that's for sure, no significant difference between a schedule 10/40 pipe in black or stainless, except for a few cents. If the wording is "ferrous" - stainless falls into that category.
I believe it specifically says not to be stainless. (Targa rules)
They are saying people who are experienced are complacent and think they know the course hence have not been doing reconnaissance and as a result kill themselves, they are really just trying to cover their ***** from all directions.
Yes, your right! The stipulation that they can also be cast steel, shows they've got their head firmly up their *****.
If sufficient heat shielding, ceramic coating, wrap or guards were installed, you'd wonder how they'd determine the material involved anyhow - one nasty parc ferme inspection!
Pity the old event director is no longer involved, he owned an rx7 and wouldn't put up with this nonsense. I'd be tempted to still clarify with the technical manager to understand the thought process....wouldn't be the first time a rule has been repealed and the poor grammar in the reg, suggests it was an afterthought.
I was talking with Rick Shaw about a few of the rules, that included, he suggested the same so I did, they were not interested in explaining why the rule existed, they just said comply or F off basically. I spoke to the previous director, his car was for sale, I was keen but couldnt rego it.
Ric and a few other competitors here were proponents of the HKS manifold, at least for the old tech turbos, because of it's longevity in hard use. Strictly speaking, it's a cast iron with probably high nickel content so wouldn't comply with the supps! I wouldn't buy a new one for the money they ask for them and it should cope with a 7670 if you're unhappy to run the existing one. A bit of bead blasting would have this one as good as new https://page.auctions.yahoo.co.jp/jp/auction/t808431437 I'm not sure if Ric's mate AB was running one of these, or a turblown manifold when he won 5 or 6 years back using a 7670.
Looks like Stuart's SP has sold, he (or Ric) are probably the guys who could make representations on the rules rather than some gumbie unknown to the organisers, if they could be motivated.
It wouldn't be off the shelf, and more than the SDR manifold, Gavin at Garage 48 down here could knock you up a fabbed one. He normally uses 2", but 1 1/2" could be done I'm sure, you'd need to supply him a flange probably. I've seen them at a fraction of the price offshore, but this is an example https://www.billetboss.com.au/#!/13B...egory=28485483
Thanks I'll look into that. When I enquired I was very polite and genuinely interested in what the rational for the rule is. The people who made the rule may no longer be associated and the logic behind it not recorded, I find often when people don't know the answer to something instead of saying I don't know they get defensive. I was looking at the hks manifold and was told it would'nt work with the EFR fitment wise, I though the kit looked great. .
Usual, who you know, the likely best case for a positive outcome - maybe a bit of cussing may have helped. Was it Mark Perry or whoever does the tech now you spoke with?
I'm sure people on here got the HKS manifold to work with the B2 frame BWs before the cast turblown one was even available, I'd certainly double check that. I know a 1.05 8374 will clear on a shorty HKS fabricated manifold.......just need to jack the engine for fitment and removal.
I asked around re the manifold but got conflicting advice, a bit too much money to spend on the 50/50 chance it works. Shame as the HKS kit was everything in a nice package for the home install.
I asked around re the manifold but got conflicting advice, a bit too much money to spend on the 50/50 chance it works. Shame as the HKS kit was everything in a nice package for the home install.
HKS just redesigned the Cast manifold too, the fit is the same, same flanges in the same places, but the runners are better, etc. they also sell it either manifold and WG only, or the turbo kit without the turbo (Manifold, WG, DP, oil lines, and gaskets) which is pretty nice. kind of what you're looking for, if your turbo fits
HKS just redesigned the Cast manifold too, the fit is the same, same flanges in the same places, but the runners are better, etc. they also sell it either manifold and WG only, or the turbo kit without the turbo (Manifold, WG, DP, oil lines, and gaskets) which is pretty nice. kind of what you're looking for, if your turbo fits
Can you buy the manifold alone? Seems like everything in Japan at least is either the kit, which is a certainty not to fit the EFR, or the W/G and manifold......if the organisers were going for cost savings, they screwed up royally there!
Manifold by itself, in divided form, used to be around $US500ish from dull memory, and I'd probably opt for the banzai 44mm adaptor rather than run the smaller HKS wastegate, if full advantage of the exhaust is to be taken - used to be 90mm - and try to avoid potential creep issues.
Originally Posted by TIMOMO
I asked around re the manifold but got conflicting advice, a bit too much money to spend on the 50/50 chance it works. Shame as the HKS kit was everything in a nice package for the home install.
I assume Elliot's not BSing from post 14 https://www.rx7club.com/3rd-generati...tment-1091758/. I'm sure Ric would have tried mounting one in the past for a local double check. He only ran twins in targa due to rules at the time, but assisting AB with running the 7670 and more than likely installing several on street cars, unlikely he wouldn't know.
Can you buy the manifold alone? Seems like everything in Japan at least is either the kit, which is a certainty not to fit the EFR, or the W/G and manifold......if the organisers were going for cost savings, they screwed up royally there!
Manifold by itself, in divided form, used to be around $US500ish from dull memory, and I'd probably opt for the banzai 44mm adaptor rather than run the smaller HKS wastegate, if full advantage of the exhaust is to be taken - used to be 90mm - and try to avoid potential creep issues.
Looks like they've only been on the market a year, wonder if anybody in the community has tested it? Anyhow, a bit moot looking closer at the regs.
This version of them was supposed to run until 2023 prior to the accidents, for reasons unknown, the BW has to run IWG, only the garretts have an external gate option. You probably could plate off the outlet and tempt Murphy! One of the long time runners there was using a T04Z - and that's no longer approved - must have been chuffed being forced to shell out more cash.
09-20-21, 10:18 PM
Was it Mark Perry or whoever does the tech now you spoke with?
