My 200mph budget build

[SoliD]

You really haven't read the thread, have you?

or anything about how to achieve top speed runs or just anything in life at all by the sounds of it.

 

[peterattheboro]

I couldnt be arsed to read every page of this thread cos im lazy, but i would say a big jaguar xj12, wich i believe they made a forged engine version of so u will have a very strong block, nos is a must for instant bhp gains and a nitro-meth kit. and try and squeeze as much torque out of the engine, its not the bhp so much that u have to worry bout. I would use an aem standalone ecu and find a very good tuner, advanced motorsport at silverstone are excellent. A twin turbo or supercharged application and setup would be needed, due to the distance i would opt for the turbos, twin t40 hybrids should give u plenty of ooomph. U also need to look at if it is to be road legal or for track use only, this will have a large impact on ur modifications, strip as much weight from the front but u will need it in the rear to give u the grip.

LOL.

 

[silversurfer]

Top gear did that, it beat Ferraris and all

 

[Matt82]

hmmm top gear never stage anything

 

[Lashout_UK]

Not an unreasonable or unexpected result though, that clip. Nothing 'staged' about it, as far as I'm concerned

 

[Fr0dders]

after all, they didnt care about practicality or reliability

they just wanted it to do a 1 mile drag race very fast. If your not after either of those, its very easy to build a silly quick car cheaply and haphazardly.

 

[turbotoaster]

hey guys, not much of an update but id mention a couple of things anyway.

since im gonna need all the help with my brakes to stop from such a speed i stripped down both calipers and rebuilt them, was a bit of a nightmare

was dirt in the fluid that messed up 3 of the pistons.

Eventually got the piston out to find it had some scoring and a burr on it:

With similar scoring inside the caliper piston recess:

Was caused by pieces of grit in the system! This is despite there being dust seals and the main piston seal appearing to be in perfect condition!! Luckily the damage was not deep and came out very easily.

Rebuilt it with new pads and bled the brakes. This was the state of the fluid:

A bit skanky to say the least!

You can see its been a while since the pads have been changed!

the next update is that because of something happened today(which i will come onto later in the post) i decided to not go with my idea of having the intercooler in the engine bay.

I have decided to put it in the bumper area, now because of the large size of the cooler and the way the stock bumper wraps around the chassis area so tightly it meant that the bumper wouldnt have the physical density to contain the full cooler.

So i went on the hunt for another bumper, since it seems someone local has been using my front bumper to bounce there car off a few times a replacement was needed anyway.

Found this going cheap recently so picked it up including the lights that go in it.

Its a copy of a japanese bumper from FEED

As you can see it has much larger opening for air intakes, this will help to get more air travelling to the intercooler over a stock bumper aswell.




Suppose the final update was that today i got invited to santapod with redline magazine, was a lot of fun and interesting to see how the car did in its very basic setup(not much up on stock)

Arrive at pod at 10am, remove all the crap ive brought from home(food etc)

Have a wander around to see whats there and sign loads of paperwork to say im happy to die lol

Put the fuel back into my map to take it off economy mode, gotta love PIM voltage settings.

DRAG RACING


Leave it on stock boost for the moment, as im still on the basemap, thinking ill up the boost later on in the day when i get my 60fts perfect.

Since i didnt have a air compressor with me i just evened the tyre pressures out on the back to 20psi(since they are just old eagle f1s)and set the teins to soft.


So this is it, little bit nervous as not really sure what to expect and never launched a rwd car at pod before.

Drive around to the start line avoiding the water trap, move into position, rev up to about 5500rpm and go.

Pull of the line not to bad, once it hits 7krpm in 1st i get massive axle chatter and it shakes me stupid, change to second and pull to 7.5k, change to third, pull to about 7k and into fourth.........suddenly ive got no power, do the usual look in the mirror for white smoke(habit from owning a r5 turbo) look at the boost and ive got 0.01bar of pressure!!

Cross the line basically rolling

Feeling a bit disheartened thinking ok this sometimes happens to me but ill try again and hopefully the solenoids will be kind to me.


Pop into the timing booth to see what my 60ft was so i can see how much i need to improve(basically expecting a 14sec quarter and a 2.5 60ft)

Get given my slip to find ive done a [email protected] pulling a 2.1667 which i thought was pretty decent since i had no power for some of the run.

Thinking if the boost holds together for the run im hoping for a 12.5 at 110mph+

Launch on the next run and get a 2.1445 60ft so a little better but since im still getting axle chatter i know my launches need more work.

Soon as i go into third gear again no boost, try in fourth and same again, nothing, cruise over the line at 17.0822@57mph lol

Shame really as i didnt even get to try a 1bar of boost

my first run only peaked at 0.69bar


SPRINTING

Feeling a bit miffed about not being able to see what potential my car has i decided to pop up to the handling circuit.

Here is a rough picture from what i remember, there might be a better pic when its in the magazine, you launch at the startline on the right and the timing stops when you come to a standstill at the end.

The picture doesnt really show how extreme the salom at the end was, much more tighter and the cones were closer together




Pull up the start, asking the guy where do you go, advises me to drive around it slowly to find where im going then come back around and go for it.

Before i had a go i asked what sort of time to be aiming for, few guys say people are averaging around 33seconds, anything less than that and your fast.

So first go and ive now discovered ive got no boost....at all, since ive now only got about 150bhp i just keep my foot in as long as possible.

dont get out of the second gear the whole way around and use my handbrake to slow the car down as the big corner tightens up, then basically understeer my way around the rest of the course(foot welded to the floor as havent got the power to get back up to speed again)
Nail the brakes very hard at the end to help pull some time back.

Guy gives me a time of 32.5secs

Feeling pretty happy with it as i basically messed up the entire lap and didnt really know where im going.

Ask what the fastest time of the day was and its fensport corolla running 600bhp on semi slicks with a time of 28.4seconds.

i then started to put some more runs in and clean my lap up

2nd run 31.7secs
3rd run 30.0 secs
4th run 29.7 secs
5th run 29.6 secs
6th run 29.1 secs

which im not 100% sure where that will leave me in the end but i was in 3rd position when i left them to it at 330pm

Not bad for a car with no power, rubbish tyres(still 20psi in the back) and havent touched the suspension.

Found compared to other people i wasnt braking at all in the corners when they were, im guessing this was pulling my time back over the big power evos/scoobs etc



So overall a few positives to take away from it and a lot of negatives.

POSITIVES

running 12s at pod in a stock twins rx7 is so easy its unreal, 10psi on a basemap with no boost in 4th, old eagle f1s, i easily broke into the 12s so that should be a good thing to everyone out there who fancies a go.

Also shows my car has decent potential when running correctly and on decent tyres

Also i didnt break anything, was little worried about the diff as i have no brace and that i might blow the engine but all was good!


NEGATIVES

to be honest its kind of my fault, i really shouldnt have asked to go with the car not being in great condition, really showed up when i needed it the most.

Im sure with boost, set of 888 tyres and decently set up suspension i would have won the sprint competition so need to address these issues



got some pics off my mates phone, god the quality is poo!!






few from sprinting

 

[Nick1881]

Nice work, done any investigation into the boost issues?

 

[turbotoaster]

havent had a look yet, but im thinking its the solenoid that controls the second turbo, its just opening up and all my exhaust gas is going doing the wastegate instead of spooling the turbos up

 

[Clarkey]

I see Stav is behind you at the starting line there, what did he clock?

 

[turbotoaster]

stav was in the 33s all day, was expecting him to be faster since he has 400bhp, 888s and weighs less than 1000kg.

i had about 150bhp, knackered road tyres and 1160kg and i was a lot quicker, think that shows the track was more about momentum than anything.


He also ran 118mph on the quarter which shows when he can get it off the line it pulls well at the top end, unfortunately his water injection nossle popped out so he destroyed his engine on the last run

 

[turbotoaster]

my new manifold arrived today, got it for a bargain price of £40 but bare in mind it needs a lot of work, ill get a friend to go over the welds again to make sure it doesnt crack, also gonna borrow my mates dremel to sort out all the overlaps on the insides, remember it looks bad now but for the money you cant expect much better lol

Once all the insides are cleaned up and its strengthened with a few well placed braces ill cut off the wastegate flange and weld on a 60mm v-band flange for my wastegate

 

[turbotoaster]

.....

 

[KarlMcWade]

looks like you still have a great amount of work ahead of you !!!!


keep it going

 

[turbotoaster]

i know, its as big a challenge as i was expecting, trying to keep it in budget is very hard, but i set myself this task and cant quit just because its not a walk in the park

Least the weathers nice!

 

[turbotoaster]

Watched the formula 1 today and even though it was 530pm the sun was still out so decided to fit my new radiator.

Heat is a major factor on a rotary engine so getting the temps down makes a big difference. As you can imagine, running flat out for around 32secs with 700bhp will put a lot of heat into the system, hopefully this should keep it in check.

Ive gone from the standard 35mm thick one to a 52mm ali rad, its an ebay one but has been proven to cope much better when the engine is pushed, a friend runs one that was getting 120c temps on a stock rad on trackdays, changed to this and hasnt been above 105c

Have a quick look at my online workshop guide on how to remove the rad, better to know what your doing before you come to do it.

After looking at the picture, it says i have to remove the undertray and the anti-roll bar.....bugger that i thought, ill try from the top!

removed intercooler

removed fans.....they are awesome from factory so will keep them

removed radiator, actually just pulled out from the top, dead easy, not sure why it says from the bottom!

Big Space!

Came to put the top rad hose back on and because the outlet didnt stick out as much as the stock one i couldnt get it on with my spring clamps, so cut a little bit of the plastic away, you cant see it at all so made no difference to me

Again, bottom part didnt line up as you can see

All in and sorted, the angle it sits is not as horizontal, the reason for that is because it hits the chassis when you try to go to the point where the original rad sat, you can get around this by fitting the rad from underneath but i couldnt be bothered for the case of 1-2* more angle

Its been a bit of a pain and not an oem fitment, but to be honest i didnt expect it to be, only seen people run this rad upright in the past so wasnt 100% sure what to expect, but for £100 compared to £300 for a branded one im happy to mess about fitting it as my time is free.

Just going to duct off the sides of the rad now so all the air hits the rad first

 

[BigglesPiP]

Is the hose attached at the bottom of the rad in image 6 with the rad in the final position, pretty risky kink in it? If so it might be worth getting a length of hose with wire in it, samco do some good stuff, I can't even begin to close it off with both hands, might not make the bend radius though.

 

[Lashout_UK]

Is that oil pooling in the intake hose there?

Keep it up either way! I'm guessing that shot with the kink in the hose isn't actually it finished and clamped up BigglesPiP!

 

[turbotoaster]

Is the hose attached at the bottom of the rad in image 6 with the rad in the final position, pretty risky kink in it? If so it might be worth getting a length of hose with wire in it, samco do some good stuff, I can't even begin to close it off with both hands, might not make the bend radius though.

Like Lashout says the pipe isnt on properly, it was just a random picture moment.

I actually attached it on properly but the oil cooler piping still made a kink as it just came out of the rad, so i cut about 3/4 of an inch off and now its fine

Is that oil pooling in the intake hose there?

Keep it up either way! I'm guessing that shot with the kink in the hose isn't actually it finished and clamped up BigglesPiP!

Yes it is, the stock twin turbos have seen better days, they dont smoke on boost etc but do pass oil into the inlet.

Which strangly enough is a useful thing on a rotary engine because its like an additional oil injection system into the combustion chamber, the car has oil injectors as standard and strangly enough im sure it doesnt hurt the situation

 

[Matt82]

does a rotary have a PCV breather system?