S50 3.5 HFM Question

[e30s50dan]

Ok...getting ready to install this S50 soon.I have a set of 21.5 lb injectors,but no 3.5/euro HFM yet!.

Does the 3.5 HFM make that much of a difference in performance??

tring to decide on which TRM chip to order.with or without the HFM,or just injectors/light flywheel.. i have a lead on a euro HFM!!

[nrubenstein]

Yes, it makes a noticeable difference. Don't skip it now.

[psyber_0ptix]

hmm....i have to research the cost/benefits of this more. surely they are all items that can be added later right? I have yet to swap the s50 in, but haven't justified the upgrade yet until i get all the drivetrain parts sorted.

[matt]

Just so you're aware, if you want to change your chip later there's usually no extra fee for that, just pay shipping both ways and whatever extra $ the upgrade would be.

And PM me when you're ready to order so I can send you a coupon code. :)

[e30s50dan]

^^^ yea that another $50 huh! I will let you know Matt

[Adrian_Visser]

Does it really make that much of a difference though? I know that matt himself has said it makes a marginal difference. I have a 3.5HFM and I sent my chip to trm to get re-burnt for it but I'm just sayin...

[e30s50dan]

can you tell the difference Adrian...looking for some numbers

[Adrian_Visser]

I have nothing to compare to my engine has had the 3.5 HFM on it since I first started it, my DME came with a chip for no HFM though.

[e30polak]

I used both on my car, and they behave differently. I saw a bit more low-end with the 3", and more top end with the 3.5". It may have been a placebo effect, but throttle response was definitely better with the 3"

[Adrian_Visser]

I used both on my car, and they behave differently. I saw a bit more low-end with the 3", and more top end with the 3.5". It may have been a placebo effect, but throttle response was definitely better with the 3"

Really? I thought it was supposed to get better with the 3.5" MAF.

[JJe30]

I'm doin the 3.5" HFM upgrade now but I won't be able to tell a diff just from that. m50 is getting s50 cams, pink top injectors and TRM chip all at the same time.