RX4 BridgePort Turbo

[600gaz]

I\'ve got a 4:1 diff and 175/50/13 tyres so it\'s more like a 4:4 with the low profile rubber . Mine\'s not got any forced induction though so the engine is a screamer and revs to 8500+rpm between shifts hence the low gearing suits it .
The turbo lot run 15 inch rims and 3:7 diffs as their engines are flat out at 6500rpm . Ideally you need to be flat out in 4th gear over the line so i\'m swopping to a 4:4 next year as mines only at 7500rpm in 4th at present .
If your running tall wheels like 17\'s then your gear ratio won\'t be far out but you won\'t know for sure until you run it . Cars with alot of grip and big turbos can bog on the line and die so that\'s where the correct gearing helps as well .

[shaunwil]

For the drag setup the FD 16\'s are a popular choice because Maccy\'T make a nice 16in tyre that fits on the FD.

Was thinking the 17\'s for when it was on the street

Shaun

[Grant Monkhouse]

Yes that\'s what I have the 16s for. Drag Micky Ts. Using and FD gear box so normally in an FD you would be hitting 8500 on or over the line with a 4.1 rear diff. So with my 4.672 rear, FD gear box and 16s I should be in 4th well before the line. If not I can drop the rear tyres to a 15" rim and get some drag tyres on those and I will definately be in 4th going over the line.

I will be launching the car at 5,500 rpm minimum as when I had my FD I was learning where the best point was between wheel spin and bogging. Got to 5,500 after spinning the wheels to take any crap off them and it bogged bad!! Come back towards the staging lanes and my diff was making funny noises so I decided to stop as I had a 2.5 hour drive home.

So 5,500 is where I will build from but I should imagine that I am going to be close to 7,000 rpm launches with drag tyres.

And also my diff ratio can be changed to any of these ratios 3.9, 4.1, 4.4, 4.67, 4.9 and 5.1!!!

[re japi]

What dif do you have? And how much did it cost?

[RobMatthews]

Grant going back to the beginning...

When you had the car shot blasted what did you cover the bare metal with between having it blasted and spraying it?
Mines going to play in the sand next week and it will be two weeks befor getting paint (welding in between)
Rob

[mjwebb48]

Yes that\'s what I have the 16s for. Drag Micky Ts. Using and FD gear box so normally in an FD you would be hitting 8500 on or over the line with a 4.1 rear diff. So with my 4.672 rear, FD gear box and 16s I should be in 4th well before the line. If not I can drop the rear tyres to a 15" rim and get some drag tyres on those and I will definately be in 4th going over the line.

I will be launching the car at 5,500 rpm minimum as when I had my FD I was learning where the best point was between wheel spin and bogging. Got to 5,500 after spinning the wheels to take any crap off them and it bogged bad!! Come back towards the staging lanes and my diff was making funny noises so I decided to stop as I had a 2.5 hour drive home.

So 5,500 is where I will build from but I should imagine that I am going to be close to 7,000 rpm launches with drag tyres.

And also my diff ratio can be changed to any of these ratios 3.9, 4.1, 4.4, 4.67, 4.9 and 5.1!!!

Its like listening to Turbotoaster! :Giggle

[Grant Monkhouse]

How dare you!! Lol.

Unlike him I am going to do what I say. And not for £9.47.

[Grant Monkhouse]

Grant going back to the beginning...

When you had the car shot blasted what did you cover the bare metal with between having it blasted and spraying it?
Mines going to play in the sand next week and it will be two weeks befor getting paint (welding in between)
Rob

I kept  it in our garage with is reasonably dry and wrapped it in cling film then etch primed it. Then started applying filler to the areas that need it. guide coat etc loads of sanding before primer again then onto paint.

It was bare metal for a number of weeks before anything was done to it and it didn\'t go rusty.

Make sure the blaster don\'t go crazy on the roof as it will get stretched and distorted and you will have a knackered car. Also on the panels.

HTH

[Grant Monkhouse]

What dif do you have? And how much did it cost?

I got t from someone in Australia called Duane. He\'s on ausrotary, told me which bits I could use from where for my rear end. He didn\'t tell me what the diff came out of as his supplier in Japan wouldn\'t even tell him.

It must be a Mazda diff though. It\'s LSD too.

[RobMatthews]

You mentioned somewhere you have strengthened the boot floor did you remove the wheel well?

[Grant Monkhouse]

You mentioned somewhere you have strengthened the boot floor did you remove the wheel well?

Yes but there isnt much more strength in it than with the wheel well. I just like how the Ali plate looks and it gives me loads of room underneath for a big exhaust.

I\'m keeping hold of the wheel well for the moment, have had to cut a hole in it to get a bolt in/out of the leef springs.

I will take a picture of the boot tonight from inside the boot and underneath to show how much better it looks.

[RobMatthews]

I want the wheel well lol

[Grant Monkhouse]

I want the wheel well lol

I take it yours I holy then? Mine had to be repaired in a few places after blasting as water had eaten its way through it.

[RobMatthews]

slightly my welder has said it may be easier to replace than patch nicely i told him find me a pile of rocking orse sht and i\'ll supply a good wheel well

[Grant Monkhouse]

slightly my welder has said it may be easier to replace than patch nicely i told him find me a pile of rocking orse sht and i\'ll supply a good wheel well

Hahahahaha think you would have more chance of finding rocking horse manure TBH