Sam_Q

here is the F20C with everything removed which looks fairly similar: with the bottom half in place, like a split block as used on diesels because of the massive load on them. The SR20 though is just a 2 bolt main caps with some bracing bolted to the top, it isn't even one peice

actually the second strongest method of clamping a crank is level with the edge of the block like that, pending how much metal is on the other side, have a look at a deisel or an F20C, they have a split block design so the crank caps are virtually part of the second part of the block. The only thing more rigid is between two crankcases - ie: horizontally oppsosed engine like a flat 4. Now with that missing bit of metal that area with it's design already looks highly reinforced.

doing some reading and a guy reports a change that works out to be a 28% increase in power from a cold air intake and a new exhaust head to tail-pipe. Working it out further that's 160kw or already equal to a beams engine edit: also has no-one ever installed quad throttles?

the more I look at this engine the more I am amazed, even near the main bearing supports they have a V support that's been hollowed out, the whole engine is like a dedicated race engine in how weight has been taken out of it everywhere. So seeing how the crank looks solid could the rev limit be raised with new rods and pistons? I don't see why not

I would love to see the result of one of these engines with 48mm throttles, good extractors+exhaust, 270/270 cams and the hi-comp pistons with a good tune. Sorry if I missed it what's the stock rev cut on these?

oh also I forgot to mention it's a good thing you didn't look at the nissan gtir throttles they are absolute rubbish. They have a 30 degree bend right right before the butterflies with a hard edge that protrudes right into the inside diameter. What a waste of potential.

the sound should change a fair bit with a new tune, my old 20v with it's sedate ignition used to have a hidious rasp to it but turned into more of a road with the new ecu and tune.

http://www.ae86drivingclub.com.au/forums/showthread.php/23363-CA-SR-Conversions-into-AEs-and-KEs

well good news guys, this was finished last week and was mailed off, so Matt should be getting it shortly

this might help you http://www.ae86drivingclub.com.au/forums/showthread.php/23363-CA-SR-Conversions-into-AEs-and-KEs

yes thanks, something good occasionally comes out of it! Although I have to give credit to my buddy Simon who does my CAD work, I give him the dimentions along with drawings and half-arse instructions for him to come up with the cad files for me.

no I can't, it's not a looks thing but rather the linkages of the throttles protrude further down than the body and without any releifs cut into that plate the throttles can close the last third. I will remove the least amount of material as possible as I was thinking the same as you, the more bulk there the better

all good Matt. Today I am going to machine a whole pile of trumpet flanges but after that I want to machine the slots between the throttle mounts on the plate to allow clearence for the linkages.

all Hail the Fonz!

well I didn't think I would be posting an update for this thread but why not. Flange is going to get cut tomorrow or tuesday, likely to be picked up on wednesday and I still have the tapping head in my mill so I can quickly tap the mounting holes out. The throttles will likely be dropped off later in the week for which I will modify the tabs to suit. The flange design looks the part and I look forward to seeing how it works it.

happy to do so, and having the plate here will make it easy. Send me a reply to that email so I may give you my address

I have some spare, and I can mod them for you in advance, however no TPS also the flanges will be water cut, I think I will go 10mm thick. Will be water cut, even the holes.

Hopefully you got my email Matt, this will be sent off with my other gear on monday. I am getting 80 flanges cut for the trumpets/velocity stacks I sell and a prototype of something else. Speaking of which how will your clearence be from your throttles to the inside of the bonnet? damn it would be awesome if I made some 310mm trumpets and you stuck them out of the bonnet!

or you could just put it on the mill later, I would be happy to skim it for you, then you can just go nuts when you weld it, got to watch out for your O-ring end though

wow that's going to work out really well. Your flange is being designed as we speak

Matt I know you have already progressed a bit but I have the profile for silvertop throttles in a cad file, I can get them arranged them with the right bore spacing and get them cut out of that 6mm plate all joined together. Probably a good idea to go thicker though to allow for warpage when you weld, aluminum warps like crazy

I will get one

I would be happy to help with your throttles, also I have a batch of alternators here that are industrial 50A units, really small and easy to mount if your interested.

it's working out really well. Assuming an ideal situation how would you make the design of the idler pulley? larger? how is it designed? just a roller and a bearing in the middle?

I will send you a PM