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The workmanship looks first rate. looks a heck of alot better than my B&B.
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One question, how do you test all performance benefits of a turbo exhaust system? Cars drive on streets not rollers. Furthermore once you put a turbo and associated hardware on an engine you have a dynamic system. This is a problem unique to turbo engines. Add to this, raw HP measurement (data?) has never been an absolute predictor of increased performance or improved user satisfaction.
Related misconceptions: Bigger brakes mean a car will stop faster. Wider tires mean greater cornering speed. Taking Enzyte means more action for middle aged guys. Pelican site truth: Exhaust system threads always get highly opinionated and often personal. Same thing happens on the N.A. motor threads. . |
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The core products are for CIS power level engines. We make kits for the high powered EFI fellows and build them to order. The configuration of the kits is chosen by the client. Sizing of the primary and secondary ID is critical to performance and discussed in length. Quote:
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I'd like to buy headers in the next year, but I would only buy a set other than B&B if I saw overlaid comparison dyno charts. GHL or Fabspeed would work too, just if I don't see rarlyl8 headers power on top of the power of a short tube header, I can't take the risk.
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Lovely work but I have one question, why does the single turbo system have thick port flanges?
Is to give the system a bit more support for the single turbo which I am guessing will be mounted a lot further away from the ports than the twin turbo system? |
Ben mentioned these could be inboard or outboard in orientation...I assume the owner is going outboard to acommodate big turbos? Can't wait to see them on the car!
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The custom headers used thick flanges provided by the client. Personal preference.
Completely understand that my standard 930 headers need to out-perform the short tube variety. It may be difficult to measure off boost torque on a dyno as copbait eluded to but I will do my best. Now if we can just get the weather to cooperate ... Yes mirrored headers can orient inboard or outboard. |
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Ideally, the turbo should be supported by something more than the header. |
I think what we all want to know is compared to the B&B style headers, do these make more power. Do they come on boost faster, do they make more power off idle before boost comes in.
All this can be measured on a dyno if care is taken. Depending on the results, dose this mean a car with equal length over shorties will be faster on the street. Who knows. More HP dose not always make for a faster car in the real world or on the track. However, responsive average HP usually dose. |
Torque and improved driveability is what I am after. No doubt in my mind I've got a gob more than I used to. A gob more power as well. Second gear never broke loose before with the furry it has now. I too am exited to see what she does at the dyno and to correlate what I see on the graph to what I am experiencing in the seat.
Don, that first set of custom headers belongs to a friend of yours ... ;) |
I'll soon be installing Brian's headers (with heat), muffler, Tial wastegate and Leask adjustable WUR all at the same time. This will be replacing the stock (Euro) system on my car. The engine is mostly stock with the exception of a K27-7200 and some fiddling of the ignition curve done by a previous wrench.
If someone can recommend a dyno in or around Toronto I'd be happy to post before and after results, as well as a comprehensive all round driveability report based on my butt dyno. |
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IMO, the only short header that needs be tested is the B+B. |
Brian,
Did you do any base line runs with your old system? Where are you seeing boost onset and full boost on the old v new? I used to do runs from 1500rpm in second or third (G50/50) and noted my boost onset and full boost points. Would be fun to know. Thx. |
My engine configuration was chosen purposely to use as a baseline for product testing. Euro heat exchangers with typical mods. Target was 300WHP. Many dyno runs have been done testing my mufflers and fuel system modifications. Stock boost spring is full open (0.75bar) by 3000rpm with the K27-7200. Max torque was flat from 3700-5000rpm. Now? Much sooner.
The weather is still bad here with salt down and many roads closed this morning. May be an opportunity to dyno at the end of the week or on Saturday. |
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I received the completed secondary assembly for the thick flange headers. I think he's gonna like 'em.
http://forums.pelicanparts.com/uploa...1266381447.jpg |
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Nice wastegate circuits.
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Nice work Brian!!! Looks like the possibilities are becoming endless.
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