Supersprint headers vs euro

S

Sajk

Member
I am toying with the idea of buying these. I am at altitude (5 to 6k feet) which costs me a lot in power. Am running fuel that has been topped up with 15% toluene to get me from 95 ron to about 98 ron with a custom tune from Josh at Severn.

I have done lots of googling and I know there is a lot on this but was hoping to reach someone here who has actually done it and has real data. They are a lot of money and in my quest to get back to sea level power they could help but it would be nice to have facts not marketing to go in.
 
I can’t help with an answer to your enquiry but I’m curious, where are you living?
 
BMWZ4MC said:
I can’t help with an answer to your enquiry but I’m curious, where are you living?
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5000-6000 feet = 1650-2000 yards = about a mile?

Denver is known as the mile-high city. (which just happens to be my final airport for my Breckenridge/Copper Mountain trips)
 
Actually Johannesburg South Africa. Parts of the city are at over 6000 feet. It gets cold but not often less than -2c in winter.

We have crap fuel with the best available being 95 ron. My house is at 5k feet. It's about a 15 percent hp loss for an NA engine which for the s54 is about 50hp.

I think with my eventuri, better fuel and Joshes tune I might have gotten back 30. It is running a bit more timing and fuel due to the added aromatics in the petrol to get me between 98 and 99 ron. It certainly feels pretty good but I have never driven it at sea level.

I was interested in the ss headers for a bit more pep but looks like it might be a waste of money unless someone chimes in here.
 
Oh. OK thanks. The rhd penalty hits in lots of ways including missing out of cheap but effective headers for my m52tu z3 which I managed to hold onto after buying the m. The us market is very well served. Understandably I suppose.
 
Sajk said:
This may have answered my question but if there is personal experience out there I would love to hear from you.

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wow!! okay, that vid really surprised me, glad someone posted it, ive been keeping an eye out for the SS stepped v1's for a few years now,. glad i didn't find any within my price range..

thanks again, will stick with the Euro headers
 
Yes I am glad I found it too. I suppose bmw stuck with the euro header design even for the csl and if there was cheap power on the table (for someone who makes cars) by modifying an already expensive to build header I suppose they would have done it. Either way it's a credible source and good news for those who can source euro.
 
I was wondering if it needed cams/airbox to make the most of the headers...looks a standard engine bay on the video, I didn't listen to it all though
 
I swapped from euro headers, which Australian cars come with, to v1 stepped headers with matching cat’d s pipe and picked up peak power even before a tune. This was also with modified primary pipes to clear the steering column. I posted the dyno charts in my thread about the headers.
 
Thanks for your reply. I read the thread and I found it a little difficult to understand if the was a stock tune euro vs stock tune ss. It is unfortunate you had to engineer in such a large restriction to clear the steering column. I was surprised to see any gains at all given that. I would have expected a loss which is food for thought actually. We also got euro headers in rsa.
 
One of the dyno sheets shows stock tune with stock headers as well as stock tune with modified SS v1 stepped headers and it made more top end with the SS headers but it was a bit rough in the mid range. The Severn tune fixed the mid range and gave even more up top. I was worried the modified headers would perform worse but the shop that modified the headers said they had done it before and gotten good results. I had already spent a bunch of money that I wouldn’t get back even though SS would refund the purchase and delivery costs, so I thought I’d just go for it. SS still refunded me some money, which I put towards some SS mufflers.
 
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