1 5/8 should be plenty big
ACP is great- I have bought 10 sets
ACP is great- I have bought 10 sets
Header fitment
- Thread starter Mario L.
- Start date
Thanks for the input but which ACP sets did you buy and for what engine / chassis?
I just sent you their phone number- tell them that Don Lawrence sent you.
'69 2800cs
Well-Known Member
Referring back to the original post, I use the Ireland headers and there is no interference with the frame rail.
Not the issue at hand here, but FYI.
Not the issue at hand here, but FYI.
Good to hear!
'69 2800cs
Well-Known Member
Some additional discussion.
e9coupe.com
Ireland Engineering Header Fitment Question
Calling anyone that has direct experience with these: Can anyone confirm if they have used these headers and not had to make an adjustment or notch the frame rail to provide clearance. I have searched and found a couple instances of people stating they did, though according to IE, this *should*...
e9coupe.com
Are you saying you tried the IRL header and it don't fit?
Or it's just what you heard?
I think the issue is quality control at IE, you get whatever they send you and hope it works. Sorry, based on anecdotal evidence.
gazzol
Well-Known Member
My experience with Fitzbits also although I'm surprised to hear that about an Ireland Engineering product
Another vote for ACP... I have been looking for headers for my E9 3.5L and there are not many options out there, relatively speaking. Per Don's suggestion the other day, I am ordering from ACP, specifically the Stahl #11 design, which is long tube, 1 5/8" primaries, (they call it their "race" header), made at their shop in PA. They are mild steel, not stainless, so I am going to get them ceramic coated. Sounds like a good company, and bonus...they answer their phone and emails! (unlike some companies)
Crazy Coincidence Larry, Gregg at ACP called me today (I previously had left a message after Don's post) and on the phone today, he kept referencing "our previous email conversation and the pictures" as he was thinking I , was in fact you!!!
I to will be ordering shortly from ACP as well. Only concern is the "long tube" design my rob some lower end performance. @Don, in the ones like this you have bought in the past, does the long tube style cause the lower end performance to suffer?
Thank you Don and everyone on the Thread for the input. Keep you all posted as we proceed.
That's funny, probably the most E9 action they got in a while.
As far as long v short primaries, as I understand it, long tube is best for preserving low to mid power. Don can probably confirm if this rule of thumb is applicable to this set up. If you are into engine stuff, there is a book called "Four Stroke Performance Tuning" by A. Graham Bell that has lots of good info (including math!), they have some good info on header design, etc.
FYI - To follow up with this, I spoke with Greg at ACP this morning, and he said they are pretty busy, so orders are about 8-10 weeks out (approximately, could be more or less). You can be put on the list, but he won't take your money until he is ready to actually make your order, and will contact prior to doing so. (I got on the list).