Gav240z

Hi everyone, just wanted to ask what the general consensus is with performance valve sizes. I have found a set which believe will suit an L28 and are 1.73" intake,(44mm) & 1.49" exhaust (38mm) Standard intake valves on an L28 are 44mm for intake but 35mm for exhaust. When you install enlarged valves is it for both sides intake and exhaust or generally for exhaust only? I'm building quite a wild motor here cam specs will be 300 degree duration and .560 of lift fed by 3 44mm Mikuni's. Just want to know if these are the most appropriate valves to use?:laugh:

How long is a piece of string? Honestly it's such an open ended question it can't be answered easily. I suggest you read a book titled "How to modify your Nissan/Datsun OHC Engine" By Frank Honsowetz. How much power you can make on the street depends on what you consider streetable. Rebello build engines however that are 280HP on SU's and I would consider those quite streetable.

Wish I was there looked like good fun.

I found one on ebay not long ago. Brand new, I didn't realise my current one was in better condition than I thought so I guess I have 2. Try ebay first because shipping such a small item kinda defeats the purpose. (I'm in Australia). Good luck.

I'm wondering what the general consensus is on this piece http://www.rebelloracing.com/price_zheader.jpg I believe it's a Nissan Motorsports piece and is the same as on the cover of Frank Honsowertz book the "how to modify....." It obviously works for Rebello.

Wow that's enough money to put a big hole in my wallet. It sure is pretty but I don't think it's worth that much to me. I think I'd go with the Fujitsubo? header like Nzeder has. :cheeky:

Great video good to see you out there having fun, makes me jealous . Just image what you could do with a few more mods like a better ratio diff.

unless he edited later there is a pic http://www.thepowdercoater.com/gallery/albums/userpics/10002/240_valve_cover.jpg

I have Tokico's worth every dollar.

Well I did buy these from a guy in the US on ebay . So that might be part of the explanation. I've seen a few Canon manifolds around from time to time at a fairly cheap price. If I can get one cheap I might grab it just incase however as Alan said I don't think I'll stress too much over it for now.

Ok with all the cam grinders out there, who do you choose? Obviously I'd be inclinded to go with what Rebello Racing in the US use, however they are all custom ground cams. I don't suppose anyone knows what kind of cam's they use or who grinds them? I've had a look around at various vendors and they all seem to have very similar profiles. I'm wondering if the cam grinders in the US are using the same spec cams as those in Japan such as Kameari and the like. I myself have bought a schneider cam kit but want to get some opinions on the best cam grinders and the most successful high HP L-series engines and what they are all using? It just seems to me that alot of these camshaft companies just follow a premade template and don't bother trying to come up with the best cam profiles on their own. So what does everyone else think?

Ok I got a set of Triple Mikuni 44's recently see my gallery if you like. They came with what I believe is a short manifold so the runners look a little more bent than the long runners of a long manifold. I'm wondering what the opinion is on these manifolds and how the length affects performance. I would believe that the longer runners would increase the torque of the engine but the shorter runners look a little restrictive with the bend in them. However having read a few articles on porting and air turbulence this might be the aim of the short manifold. To slow the air just enough and reduce the turbulence before entering the combustion chamber. The manifold itself is a Mikuni item it actually has a Mikuni stamp on it. So what's the verdict what do the experts think?

I was bidding on this magazine on ebay but it went a bit rich for me especially since it was in US dollars and not AUD. Anyway pictured is two 432 Zeds.

Hello and welcome to the club, I'd personally love to see pictures of your Fairlady ZL. I hope you find the club a useful resource. We certainly have some knowlegable members.

Hi Carl, I'm curious about original colours and the value of Zed cars. My car was originally silver I can see when I check the areas under the carpet inside the car. The rest of the car however was painted red later in it's life. This includes engine bay inside the door area and the tail gate etc.. I have been considering painting the car it's original colour however if I was to go with a color say 910 Red would you say it would devalue my cars value to the right buyer? As oppose to painting it in the original silver it left the factory. We are talking a RHD HS30 Zed from Australia. I would appreciate your thoughts.