My 200mph budget build

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Alex_6n2 said:
Project looks good mate. Cool idea but I can see you overspending quite easily lol!
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You have no idea mate, everything i buy i need to spend a week tracking down the cheapest prices to get within budget, if the purse strings werent tight on this id probably pump 20k into this

pzr vr6 said:
probably busy mate
ps sorry for the thread hijack :o
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ah no worries mate, do you happen to know what time the rolling road starts, 9am?
 
Very interesting thread, thank you for going to the lengths of explaining what you are doing and why especially with the ports, very interesting!

If I were doing something like this I would be tempted to see what I can do within the budget then blow the rest on insurance (be that a parachute or something to help stop or something to help it get to the marker).

That phone holder worked out perfectly for you aswell, I was going to suggest the cheap Tesco hold all phones thing that I have that cost about £7 and blatently isn't a satnav holder but you cant beat £2 and it can't fall off the screen either!
 
pzr vr6 said:
actually i can nip down sat am iv got my manual 4wd controller back from hollland i need to drop that off what time are you goin mate?
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well if its starting at 9am ill get there then to watch, beats lying in bed all morning or getting dragged around the shops.

5abr3 said:
Very interesting thread, thank you for going to the lengths of explaining what you are doing and why especially with the ports, very interesting!

If I were doing something like this I would be tempted to see what I can do within the budget then blow the rest on insurance (be that a parachute or something to help stop or something to help it get to the marker).

That phone holder worked out perfectly for you aswell, I was going to suggest the cheap Tesco hold all phones thing that I have that cost about £7 and blatently isn't a satnav holder but you cant beat £2 and it can't fall off the screen either!
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thats very much, i find i absorb so much information on things i enjoy thats its nice to share it every so often, i can sit and enjoy reading peoples tech articles all the time so thought id do one for something that isnt a common none thing.

im under know allusion that making 700-750 will be a walk in the park, i used to work for fuchs/silkolene so ive spent a lot of time around oils, fuels etc hopefully that knowledge will make this process go along easier, a big issue when you get to this sort of power is the rotors bashing the plates(the bit you port) which can cause the seals on the rotor to pick up and become stuck, ie the spring doesnt push the seal back out of the rotor and onto the plate(making good compression) to get over this issue im going to increase the amount of oil that is sprayed into the chamber, mixing in 2 stroke race ashless oil to help with lubrication in my fuel and also a mix of 15w50 race car oil from a pump to also help the situation.

If you want more random tech stuff just ask as i enjoy writing it :)

I think im going to write another one on here tomorow on turbo compressor maps, then fuel injector sizing, ill do them both for piston engine applications which should help people in future as a point of refence on there piston engined vehicles
 
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my oils arrived today.

Love that i worked for silkolene, free oils, would have cost me £320 if i needed to buy all that!!

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thats fully syn 15w50 oil
gearbox and diff oil

gonna replace it all sometime this week when i get chance
 
on stock engines its best to run 5w-30 or even 0w-30 in really cold countrys.

the problem you have is when u get to heavy use on them, 2 issues happen.

one being is because they run a lot richer you get blowby past the sideseals(like pistonrings) so you fuel mixed into the oil which thins it down to much, hence going for a thicker oil helps keeps its vicosity and high oil pressure for longer.

Also due to this engine being worked a lot harder than a stock one theres much more heat generated into the oil which in turn thins it down to much and you dont get enough pressure, its a big thing in california/miami, where they have big power ones, love to dyno and a lot of heat is generated.
They get to the point where oil pressure is to low and the stop dynoing etc.

they normally go to 20w50 mix to keep the pressure where they want it, im going 15w50 as my car isnt a dynoqueen so it will get much more airflow and also cold start are in much lower atmos temps
 
Hi Turbotoaster. I've read the majority of this thread. Sorry to see it got a bit heated earlier on and glad to see it is back on topic now. I look forward to reading the updates. Maybe each time you post an update you could put a big "UPDATE" in bold, large, red text or something? That way for those of us that don't have quite the time to read all of the thread and other silly posts, we can quickly zap to each update? I wish you luck. I hope you get it done before Autumn though.
 
Wow, an amazing thread (how did I not see it before!?)

Some great technical info, and I'm going to be really interested to see you bring it in at budget (and hope you won't go over budget).

When you do the run, you'll need to get some cameras set up in the car, too!
 
jaybee said:
Hi Turbotoaster. I've read the majority of this thread. Sorry to see it got a bit heated earlier on and glad to see it is back on topic now. I look forward to reading the updates. Maybe each time you post an update you could put a big "UPDATE" in bold, large, red text or something? That way for those of us that don't have quite the time to read all of the thread and other silly posts, we can quickly zap to each update? I wish you luck. I hope you get it done before Autumn though.
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To be fair, watching everyone get heated made me laugh quite a lot, seems theres a lot of in-fighting on the forum, i dont really know what they were argueing about though, im just looking to share and offer/recieve info.

Does anyone know how to change the title of the thread so that each time i get parts/work done? If this makes it easier for the subscribers.

Another update is ive changed my injector setup to try and give me a more reliable setup, make mapping easier and save some money

There was a few issues with my original idea which i did not foresee.

One was that the additional 1600cc injectors are low impediance which means i would have to install resistors before the injectors, i knew of this and didnt think that was a big deal.

I assumed that would make them act like high imp ones, and my apexi ecu would control them as such(thats normally true) i was gonna trick my ecu into thinking that each injector was infact 2450cc(1600cc+my original 850cc) so that they fire together, the issue is the ecu will end up messing up the transition from small primary 550cc to the 2 big ones and flood the engine.

I have now solved this problem by coming across 'injector dynamics' 2000cc injectors, they are special injectors that even when the fuel pressure is increased they provide a consistant spray pattern.

by running these at 50psi base pressure they will provide 2500cc each which as i need 6000cc and i have 1000cc in primarys in the car this will be perfect.

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the other benefit is i now dont need to by injector holders to weld into my upper inlet manifold which saves me money, the injectors are more expensive thant he 1600cc, but i think its work it for simplicity.

So i ordered them last night from america so id imagine they will be here sometime next week.


Unfortuately i cant get it done quicker than autumn as i physically cant get the money quick enough, if someone lent me £3k now id have the car complete for march :(

Confused said:
Wow, an amazing thread (how did I not see it before!?)

Some great technical info, and I'm going to be really interested to see you bring it in at budget (and hope you won't go over budget).

When you do the run, you'll need to get some cameras set up in the car, too!
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Im sure the magazine will bring loads of cameras and there will be a few people to film it with there phones.

In terms of budget its all about adjusting and adapting to meet it, i know i can do it as there are places i can save and then places where its expensive, just a matter of being patient

Bunka said:
Apologies if i've missed this, but where are you looking at doing the run?

M25 at 4am? :p
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Ill be doing a few tests on 'private' test track before the event to make sure everything is working as it should, though cant quote exact speeds that will be hit ;)
 
what tyres you gonna be using for this?

i thought about you on saturday whilst stood next to a Merc S55 AMG/Brabus, on a dyno, peering through the window, seeing the speedo go off the 180mph clock, looking down at the rear tyre (2ft-3ft from my right left)

the tyre had expanded so much, the bead/rim protector was raised a good 5mm-1mm from the rim
 
Well, i've learned a bunch about how engines work from this thread! I'm not really a mechanically minded guy and avoid it if i can help it... but this is proper interesting. Subscribing! Good luck!
 
Matt82 said:
what tyres you gonna be using for this?

i thought about you on saturday whilst stood next to a Merc S55 AMG/Brabus, on a dyno, peering through the window, seeing the speedo go off the 180mph clock, looking down at the rear tyre (2ft-3ft from my right left)

the tyre had expanded so much, the bead/rim protector was raised a good 5mm-1mm from the rim
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That was one of the first things i did ask about when i thought about tyre sizes etc.

I was more thinking about the centrifugal forces makes the tyre expand beyond its 'natural' size.

When speaking to Rod about it, he said when calculating his stack dash off gears and cold 35psi tyre size he ended up still being close, ie at 200mph his stackdash was 1mph out.

So he believes there is a very small amount of expansion but not enough to add it into the equation.

Accelarating from 60-120 will cause a small increase in tyre pressure due to heat of friction and a little bit of wheelspin but then will equalise after this point.

The issue you see on a rolling road is infact the car wanting to wheelspin in the rollers for the entire run, this will generate heat and cause the tyre expansion, ie you can wheelspin a car on the rollers in 4th but not on the road at the same rpm.

Ill be using toyo 888s as this will give me better traction out of the corner onto the straight and have been proven to run at 210mph safely

DampCat said:
Well, i've learned a bunch about how engines work from this thread! I'm not really a mechanically minded guy and avoid it if i can help it... but this is proper interesting. Subscribing! Good luck!
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glad to be of help, any questions you wanna ask about anything mechanical on rotary or piston ask away :)
 
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