Papercup's V8 RX7
Discussion
Time for an update, as I've been falling behind with my photos sent from Craig, and forgot completely to post a few that I took myself, as I've been up a few times in the last few weeks.
First of all, a nice comparison of 'original subframe' versus Craig's 'Franken-Subframe':
Original:
Modified:
Original:
Modified:
The new cam is here and fitted, as are the new valve gear. Check out the difference between old and new:
So now this:
is waiting to go in here:
First of all, a nice comparison of 'original subframe' versus Craig's 'Franken-Subframe':
Original:
Modified:
Original:
Modified:
The new cam is here and fitted, as are the new valve gear. Check out the difference between old and new:
So now this:
is waiting to go in here:
As well as the obvious work going on (new engine, box, diff, driveshafts, propshaft, etc) I'm also addressing an issue with my headlamps. You may remember I have the Knightsports pop-ups, which look pant-wettingly good:
Unfortunately the lights they come with are pant-wettingly bad. They are only spotlights with no beam pattern, are not e-marked and are downright terrifiying at night.
So I've bought these:
Those are e-marked Hella dual projectors. They have a little motor inside them so they are dipped beam and high beam when you pull the stalk, the motor moving the small piece of metal out of the way to allow all the light through.
They come from here: http://www.s-v-c.co.uk/search/?query...rds=6&x... - just type '90mm' into the 'search' box to see the range.
You can see they do 'just dipped' and 'just main' so you could have one of each if you wanted to save some money, or one 'dipped' and one 'both' so that when you 'high-beam' you get all 4, but dipped is only two.
I cannot wait for full quad-light goodness
Unfortunately the lights they come with are pant-wettingly bad. They are only spotlights with no beam pattern, are not e-marked and are downright terrifiying at night.
So I've bought these:
Those are e-marked Hella dual projectors. They have a little motor inside them so they are dipped beam and high beam when you pull the stalk, the motor moving the small piece of metal out of the way to allow all the light through.
They come from here: http://www.s-v-c.co.uk/search/?query...rds=6&x... - just type '90mm' into the 'search' box to see the range.
You can see they do 'just dipped' and 'just main' so you could have one of each if you wanted to save some money, or one 'dipped' and one 'both' so that when you 'high-beam' you get all 4, but dipped is only two.
I cannot wait for full quad-light goodness
Edited by papercup on Wednesday 30th May 17:15
Oh, and yesterday I dropped the headers and downpipes into Zircotec in Abingdon to have them ceramic-coated, as part of my plan to lower the underbonnet (and in-car) temperatures. It better bloody work, is all I can say, as its £800
It was tempting to go with the bright red, but the metallic black is harder wearing, and I've always been more about function than form......
It was tempting to go with the bright red, but the metallic black is harder wearing, and I've always been more about function than form......
Loving all the updates and can't wait to see it rolling again.
Anyone following this thread might also find this interesting:
http://www.motoiq.com/projects/mazda/project_mazda...
Moto IQ's long term V8 RX7 build using a lot of parts (inc transmission) not dissimilar.
Anyone following this thread might also find this interesting:
http://www.motoiq.com/projects/mazda/project_mazda...
Moto IQ's long term V8 RX7 build using a lot of parts (inc transmission) not dissimilar.
Hi,I'm new to the forum and have found this thread very helpful and inspiring.Planning my own LS/RX7 build and was just wondering if some of that beefing up of the rear subframe could be avoided if torque bars similar to that use in the Hinson set up or the standard RX7 for that matter were used.So a Cobra and Viper rear are being used,any thoughts on using a Monaro diff.Thanks,Kev.
jukeboxkev said:
Hi,I'm new to the forum and have found this thread very helpful and inspiring.Planning my own LS/RX7 build and was just wondering if some of that beefing up of the rear subframe could be avoided if torque bars similar to that use in the Hinson set up or the standard RX7 for that matter were used.So a Cobra and Viper rear are being used,any thoughts on using a Monaro diff.Thanks,Kev.
You'd need to talk to Craig to get definitive answers. I know the Rex diff has trouble with the torque of the V8, but it will be fine for a while. Mine's getting the Viper diff but Craig has a Cobra one on the bench being modified for another one. I haven't seen the hinson set-up but it doesn't sound very substantial as I know where it bolts on. Have you seen the original set-up on the back of mine, with the Mazda diff? Early pages of this thread....that's Craig's take on the Hinson rear-end [or limitations thereof] I believe.
I have this 'constant improvement' thing in my head; every time something is changes, it must be better, bigger, stronger. I was offered these yank driveshafts and they partner with a viper diff, and while the whole rear end is out anyway......
I had a Dana 44(out of a C4 Corvette but basically same as Viper)planted in the back of my 61 Corvette and it was unbreakable,car was 575hp....LS1+Procharger.That used normal hardy spicer u-joints both ends,so was wondering what and how, you have mated the diff to cv joints? Are the outer joints RX7? Sorry for all the questions but have got to make a decision on the direction to take.Car will be road,some track days and occaisional drags.Cheers.
We use cv joints on the diff as the rx7 outer is a fixed cv so no plunge to allow for suspension movement , the Hinson kit uses a rose joint onto the gearbox from the diff nose via a long arm , I used this set up on my first ever rx7 conversion 8 years ago , it went in the big weeks after fitting !! It pushes and pulls the gearbox all over the place . Probably ok for stockish power and normal driving but not great for big power and hard use . I've fitted some hella 90mm zenons to mine and I now have a car I can drive at night !!!
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