Jump to content
SAU Community

R32 Ls1 Conversion

BezerkR32

By BezerkR32,
in Motorsport Builds

 Share

Recommended Posts

  • Replies 812
  • Created
  • Last Reply

Top Posters In This Topic

Popular Days

Top Posters In This Topic

Popular Days

Posted Images

Sydneykid Grand Master

Sydneykid

Posted
Posted
sounds awesome in the vid!

Dave's inlet system at work there.

visibly diving under brakes and getting light in the rear end is going to be either too little front shock, front spring, or anti-dive geometry. Or a combination of the three. Shock and spring is where I'd be starting.

It has fair bit of bump valving in the front shocks and we can't run high spring rates at Oran Park as it is far too bumpy since there hasn't been any track maintenance for 3 years. It could do with a little more anti dive geometry, but it has lots of front braking capacity (in excess of the rear) so I was reluctant to suggest to Stu that he reduce the front weigh transfer too much. Lest it start locking up front brakes, which is not good for an inexperienced circuit driver.

Cheers

Gary

Merli Grand Master

Merli

Posted
Posted
Its two weeks away. Don't you just need a clutch to make it drivable.

This isn't Fast and Furious... Parts don't automagically come "overnight from Japan" :)

I'm assuming that it'll be at least 2 weeks before I see the clutch...

Ben - Do what I do, and work from the track...

Sure, you might have to put up with Duncy Dinosaur pointing and laughing at you whilst you're hiding in your car making a few phone calls, and you might miss a few sessions here and there, but beats being in the office! ;)

S13Deviat Grand Master

S13Deviat

Posted
Posted
Stuart,,,I'll echo what some of the boys have said,,,I would add a real rear spoiler,,,dual plane adjustable nothing less,,,no gay drift rubbish but a real one. Gary will know where to find one and him corner weighting the car will help heaps,,,you might find you have to transfer or add weight the rear.

What about lowering the fuel tank,,,A9X style.

Turn 2 could be just be you carrying to much speed,,,you won't be the first or the last to mow the grass there. Ando and I were laughing our heads off,,,we both could see what was about to happen,,,Sorry tiger but it was funny. Interestly Ando had time to watch,,,pull another cog,,,laugh and toot the horn.

I'll keep you to that drive mate by the way.

Neil.

What ^^^^he^^^^ said :( My wing is certainly no engineering masterpiece, cost me a sweet $100 smackers 2nd hand.... As mentioned it could do with sitting higher and having a dual plane, but on a Team PSR (Povo Spec Racing) budget, my $100 wing will do just fine ;)

Hey hey i had time to do all that simply because i slowed down and pulled out the popcorn to watch the Yellow Tug Boat 'slide' into dock..... :)

hrd-hr30 Grand Master

hrd-hr30

Posted
Posted
Dave's inlet system at work there.

It has fair bit of bump valving in the front shocks and we can't run high spring rates at Oran Park as it is far too bumpy since there hasn't been any track maintenance for 3 years. It could do with a little more anti dive geometry, but it has lots of front braking capacity (in excess of the rear) so I was reluctant to suggest to Stu that he reduce the front weigh transfer too much. Lest it start locking up front brakes, which is not good for an inexperienced circuit driver.

Cheers

Gary

you think that's bumpy, you should see QR & lakeside! Apart from turn 4, they make OP GP look like a billiard table.

as for the wing suggestions, that's just a band aid solution. At best. You're far better off working on mechanical grip first. Oran Park is a low speed circuit anyway.

Neil Grand Master

Neil

Posted
Posted
as for the wing suggestions, that's just a band aid solution. At best. You're far better off working on mechanical grip first. Oran Park is a low speed circuit anyway.

So Harry are you saying a rear wing is not a good idea?. I agree O/P is not the fastest track but you still need down-force and rear end stability through turn 1, and a couple of other short straights that have your foot mashed.

Neil.

hrd-hr30 Grand Master

hrd-hr30

Posted
Posted
So Harry are you saying a rear wing is not a good idea?. I agree O/P is not the fastest track but you still need down-force and rear end stability through turn 1, and a couple of other short straights that have your foot mashed.

Neil.

I'm saying its not a good idea to try and fix his stability problems by adding a wing. He's got issues with its mechanical setup. Don't try and fix that with aero. Treat the problem (excessive dive) not the symptom (rear end instability).

Beer Baron Grand Master

Beer Baron

Posted
Posted

hey big boy. I was gutted I couldn't get out there on friday to see the beast. :) but so pleased it went well.

R32s trying to swap ends under brakes is a very common trait.

a few things that will help.

what are the current camber and toe settings front and rear?

if you don't already some toe in on the rear will help stop the back from trying to overtake you round the outside!

also driving style helps too. the R32s do not want you doing any turning under brakes. trailing any brake as you turn in will see it want to swap ends. this is especially prevalent at turn 1/2 oran park as the track slopes down a little that way too.

after you've done any alignment and driver adjustments then look at springs/shocks/bars/geometry changes.

anyway, spinning off a few times at least shows you are trying and no doubt when you get the hand of it you'll be quick. :) well done.

Sydneykid Grand Master

Sydneykid

Posted
Posted
hey big boy. I was gutted I couldn't get out there on friday to see the beast. :) but so pleased it went well.

R32s trying to swap ends under brakes is a very common trait.

a few things that will help.

what are the current camber and toe settings front and rear?

if you don't already some toe in on the rear will help stop the back from trying to overtake you round the outside!

also driving style helps too. the R32s do not want you doing any turning under brakes. trailing any brake as you turn in will see it want to swap ends. this is especially prevalent at turn 1/2 oran park as the track slopes down a little that way too.

after you've done any alignment and driver adjustments then look at springs/shocks/bars/geometry changes.

anyway, spinning off a few times at least shows you are trying and no doubt when you get the hand of it you'll be quick. :P well done.

It has rear toe in, plenty in fact.

My guess is it has so much bump steer at the front it is unstable under brakes and sawing away at the steering wheel correcting the bump steer is unsettling the rear end.

Cheers

Gary

hrd-hr30 Grand Master

hrd-hr30

Posted
Posted

unless the front end been significantly altered it shouldn't be any worse for bump steer than any other R32 - except for the amount of pitch its getting under brakes, which certainly sounds excessive from the descriptions. less pitch = less bump travel = less bump steer.

Sydneykid Grand Master

Sydneykid

Posted
Posted
unless the front end been significantly altered it shouldn't be any worse for bump steer than any other R32 - except for the amount of pitch its getting under brakes, which certainly sounds excessive from the descriptions. less pitch = less bump travel = less bump steer.

The steering rack location has been significantly altered.

Cheers

Gary

BezerkR32 Veteran

BezerkR32

Posted
  • Author
Posted

yeh its something that was overlooked when mounting the rack, but can be rectified, not sure why it would be causing me issues only in turns 1 & 2. I had less trouble later in the day after some instruction on my line into turn 1. but turn 2 was still an issue, i think i wasnt braking hard enough and going in a bit hot while still trailing the brake. Ill have to give it another go and try some changes on the day. i just wanted to drive it on Friday.

ah... have fun with that one!
Sydneykid Grand Master

Sydneykid

Posted
Posted
yeh its something that was overlooked when mounting the rack, but can be rectified, not sure why it would be causing me issues only in turns 1 & 2. I had less trouble later in the day after some instruction on my line into turn 1. but turn 2 was still an issue, i think i wasnt braking hard enough and going in a bit hot while still trailing the brake. Ill have to give it another go and try some changes on the day. i just wanted to drive it on Friday.

It's curable, just needs a bit of time spent on it. Time consuming yes, but not hard, just work through the processes.

It may need a little less brake bias to the rear, but that's also easy to fix. But first we fix the bump steer.

Cheers

Gary

  • 2 weeks later...
BezerkR32 Veteran

BezerkR32

Posted
  • Author
Posted

sorry as there has been no updates as i havent touched the car sinse OP, have been preparing spare bedroom for my daughter as to prepare her current room for my new arrival who decided to join us at 11.55am on sunday morning. Gorgeous little girl weighing 3kgs and 50cm tall. Mum and new daughter doing well, still havent named her.

ill give it a couple of weeks for them to settle in at home and then ill be back into it.

Thanks for all your suggestions and input also, just have been offline for a while and unable to reply till now.

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing


  • Similar Content

  • Latest Posts

    • Duncan
      R33 GTR running -9 with no tune

      By Duncan · Posted

      Sounds like you've got an interesting adventure ahead here with local support if you have trouble! My guess is that, unboosted, you will be OK with a small upgrade like -9. What will happen is that once the stock ECU sees more airflow than it expects it will add a heap of fuel and pull a heap of timing to be safe because it can't understand how it could get that much air without there being an issue. You will see clouds of black smoke and it won't pull hard through the midrange and top end. So, overall it will be a bit frustrating but should be OK. If you are still nervous set the base timing back 2o through the CAS, but it will be even more sluggish everywhere. As said above through...this is not my guarantee your engine won't be blown into a million pieces, leaving you looking for very hard to find parts A better idea is get a computer with logging ASAP, wire in a wide band O2 sensor and a use remote tuner. I've done multiple cars this way and while it is not as good as a specific tune on a dyno they can get it 90% right. I'd suggest if you can afford an R33 GTR these days you can afford an ECU and tune. And if you can't afford that you sure won't be able to afford the rebuild if it goes bad in the meantime,.  
    • Duncan
      New kid on the block

      By Duncan · Posted

      Yeah it would be nice if someone took the time to put that sort of information together, but there are a lot of variations in looms. I think you are making this way hard for yourself if you just want to get it running....sourcing an SR20 with the right wiring will be a billion times easier than matching the RB loom to an S15 chassis. If you do end up going this way, you just need to trace every wire in the loom with a multimeter, 95% of them will go to a location you can confirm at the ECU.....and then post it up for the next person who needs it  
    • Duncan
      Coolant leak?

      By Duncan · Posted

      Just top it up with water, and keep a general idea of how much you added. It is normal for water to be pushed into and pulled out of the reservoir through the cap, and it should not be more than half full or it will be likely to overflow when hot. Any decent mechanic can do a pressure test of the cooling system to confirm if you have a leak. Keep in mind if it is only leaking a little and when hot it may well evaporate before you see it hit the ground
    • GTSBoy
      Coolant leak?

      By GTSBoy · Posted

      I'd ask the shop what they used and use that. Mixing coolants is sometimes OK, sometimes not, and you have know the details of each coolant to know whether it's a good idea or not.
    • Chupapy
      Coolant leak?

      By Chupapy · Posted

      Is it alright to top up with just another green coolant?
×
×
  • Create New...