Is it possible to mount 308QV heads on a 328 engine ?Both of my 328 heads are cracked and i have two 308QV heads. Is it possibel to repair a cracked head ? Dirk
My first reaction would have been to say "no", since bore, stroke, and compression are all increased on the 328, relative to the QV: (F105A (QV): 81mm(b) x 71mm(s), 9.2:1 (Std) (8.6US); F105C (328): 83mm(b) x 73,6mm(s), 9.8:1 (Std) (9.2US)) However; in the 308QV/328 Workshop Manual (Cat.550/89 - Cod.N.95990873), the specification (on page B50) for the 328 Cylinder heads states: "Heads, valves, valve guides and valve seats have the same specifications as those of page B23, the sole difference being that the spark plug seats are threaded to M12 x 1,25." (B23 has the specs for the QV's heads.) So that one source seems to imply "yes". But I wouldn't go by that alone. (Wouldn't a 3.2 need larger valve openings to breathe through?) Hmm. If the heads are the same spec, I wonder if the intake manifolds are interchangable.
Yes - I believe the intake manifolds are interchangable as my qv carb manifolds bolted up perfectly to the 3.2 head. I also believe the cams are interchangable. best rt
"qv carb manifolds"? I thought all QVs were CIS. (Or was that only the US models?) Did you dispose of your old injection manifolds yet? (I guess I can broaden my search for 328 or QV intake manifolds to mod for EFI. -- Yes, I know: Why EFI? Simple answer: OBD. A "daily driver" needs to keep track of its own health -- something the older Bosch systems do poorly. The modern "computer cars" have robbed most mechanics of diagnostic skills.)
Off the top of my head, I don't know any any aftermarket units that do that, motec maybe. I know the haltech I have doensn't and it's there latest and greatest.
Yes, they are. My installation is a retrofit. I traded them to T-rutlands for some magic beans. I'm pretty sure a qv or 3.2 manifold will fit your qv heads, and that the qv heads will bolt up to the 3.2 block. How did both heads become cracked? best rt I would like to point out that it has now been over 13 hours since the last 'Nick's 4.0 liter' thread posting, and the world has not ended.
intakes and headers are identicle--plenum is a bit different. AS FOR using the 308 heads on 328---NOT SURE--being that the bore of the 328 is larger--the head gasket may not fit. I think a 328 gasket MIGHT work but a 308 definately will NOT. The metal crush ring will fall 1/2 way into the cyl area---it will not seal. Another point is that the 328 head gasket is much stronger than on a 308----more compression--hotter--it is questionable therefore--does the 328 head have more mass? is it stronger? will the 308 head crack under pressure? hmmmmmmmm
sounds right, use the 328 gasket. I think I can say that a 308 will handle the extra heat/pressure, mine sure do.
Oh, I should have mentioned that I was looking at adapting a Renasas M32R processor. (I started out looking to build a plug replacement for the Marelli Multiplex, and the project just started to grow. It's easier to replace the CIS than to add diagnostic sensors to it.) For me, the computer is the easy part. (A four zone, fully redundant firewall network interface design is an afternoon's work. By comparison, I just spent a week trying to fix a leaky toilet feed pipe. ) Computer nerds with a wrench are dangerous. According to the Norwood web site http://www.norwoodperformance.com/328.htm, the stock 328 head gaskets all fail with the turbo boost mod. You might want to try the copper head gasket they offer, as long as you're swapping heads anyway.
Dang. Being a professional paranoid, I've never done the e/bay thing. (On the (now offline) archives, on the subscription thread, there was a long debate over the safety of PayPal. I was going to reserve one of the now-redundant accounts as a DMZ account for online use, but the bank merger is still in flux. (BankAmerica took over two banks I had accounts with.)) Looking at the e/bay picture, those don't look all that much like 328 intakes. They are solid across the bottom, where the 328s look to be separated (at least at the head mounts).
How bad are the cracks, where are they cracked, in most cases a good machine shop should be able to repair. Get a quote for the repairs though, as it can be costly and should you think the repair costs are too high we have brand new US spec heads complete with cam covers that are competitively priced.
I think those are 328 intake manifolds on Ebay based on what came off my car. Man, the price is sure good so far... best rt Image Unavailable, Please Login
The heads are cracked between the valves. I have just asked Ferrari_UK about a price for an euro head. Please check Your mail and give a price for those us heads. Can i use these heads on an euro 328 ? Thanks Dirk
I dont know how these heads cracked. These heads come from a Euro 328 engine that i want to put in my US-QV Car. These engine was cheap, actually i know why. But there was no chance, to see these cracks before cleaning and removing the valves. Dirk
Yep, I'm selling them. They ARE from a 308QV. MkE's supercahrger plenum/manifold is is taking their place. They've been sitting collecting dust for a while. Trying to generate some disposable income for a new (to me) Horsey that I'm resto-modding. They'll be gone by late this evening as there is already some bidding activity. JD
