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L28 ET project
- Thread starter twoforty
- Start date
Or some poor ones if you dont get the rubber right
With all these high HP cars in build, I cannot stress the importance of putting some decent rubber down.....particularly on a car that weighs less than 1100 kilos...... lose traction halfway up the strip on boost at 90 MPH and your going to have a very bad day......VERY quickly
Your Nippon nevergrips or your Nanking ditch finders just wont cut it here.
I am running 8.5 inch rims with 225mm of the best track day tyre (practically cut slicks) money can buy and I can still light them up with a full throttle launch and chirp them in 2nd and 3rd....thats with a measly 260HP, so Lord knows what 400+HP will do
Then you have to think that if your running an open diff, all that power is going through one drive shaft.
If your running a plate diff, all that power is running through one drive shaft for a split second until the clutch pack reacts then its distributed... but a split second is enough to make it all end in tears.
Your grip/traction/drivetrain has to be as good as possible, otherwise all that extra power is pointless
twoforty
Well-Known Forum User
I'm running Pirelli P zero rosso 255/40/17 standard fittment on 911's so I would have thought they should grip fairly well, obviously an LSD will also be added. I guess if you hit all that HP all at once into the drivetrain something will give for sure, I'll take it steady, not looking to beat anyone elses record, purely for a bit of fun.
At the end of the day, If I blow my gearbox, diff or driveshafts, I'll buy some more
At the end of the day, If I blow my gearbox, diff or driveshafts, I'll buy some more
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datsun dave
Club Member
twoforty said:
Just waiting for the block and sump to come back from the engine shop with the mods required for the swop
As you know you will have a list of things to do to but will have to do them in a sort of order that will keep the project moving.
zedhead260
Well-Known Forum User
twoforty said:
But your six cylinder engine is sat over the front wheels, not the rear ones
twoforty said:
The L6 Turbo record officially doesn't exist, although I think it fair to say that Dean Bottriel would have been the holder.
It might be worth another look, but we couldn't tell from the magazine archives when Dean started using NOS (which would supercede a HoF entry anyway) - The 13.871 which sits at number one slot in Class 3 is from Dean's attempts at supercharging, which by his own admission didn't prove to be as successful as he has hoped, and hence the return to turbo.
I am looking forward to seeing some of the high HP cars at the strip and it's good to see a few more people go down the L6 turbo route.
datsun dave
Club Member
zedhead260 said:But your six cylinder engine is sat over the front wheels, not the rear ones
The L6 Turbo record officially doesn't exist, although I think it fair to say that Dean Bottriel would have been the holder.
It might be worth another look, but we couldn't tell from the magazine archives when Dean started using NOS (which would supercede a HoF entry anyway) - The 13.871 which sits at number one slot in Class 3 is from Dean's attempts at supercharging, which by his own admission didn't prove to be as successful as he has hoped, and hence the return to turbo.
I am looking forward to seeing some of the high HP cars at the strip and it's good to see a few more people go down the L6 turbo route.
Remember gents we have not see Mark Rayners L6 Twin Turbo car run yet
I have seen it today!!!! (and its going to be quick)
Oh boy are you in for a surprise...the GT3 weighs 1300 kilos and runs what ? low 12's or so....400HP in an Z weighing <1100 kilo is technically enough for low 11's
....(Mclaren F1 territory) Its not the breaking of componants that worries me its the near instant 90 degree "snake" that is known to occur with big power/low traction affairs and the subsequent T bone into the concrete barrier that then ruins your day.At the end of the day, If I blow my gearbox, diff or driveshafts, I'll buy some more
well we've only been waiting 3 years....its the longest "running in" period known to manDatsun Dave said:
only kidding Mark we all know your just "taking it easy"
260Z TT
Club Member
well we've only been waiting 3 years....its the longest "running in" period known to man
Mr I kid you not chirps up again!
I will be back, but due to a lot of repeated lower back problems, not much has happened of late! The last time my Z saw light of day was at the Oulton Park Gold Cup meeting in 2005! It has not even been washed in all that time!!!
I must try to make an extra effort and finish all other engine builds on the cards.
Mine shall be getting ARP head studs and rod bolts, crank scraper, csr electric water pump, hopefully an aluminium rad and new fan setup.
The blowing exhaust manifold will have to be sorted with a one-off gasket.
Front brakes are getting a monster upgrade with Nascar discs and Wilwood Integra 6R 6-pot calipers!!
Hope to see all soon,
Mark.
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strange phrasing.......or maybe is it just a term of endearment from you cheeky Cheshire Chappies.
You cant blame me for taking a cheap shot though ....very little in the way of news ever comes out your neck of the woods...despite many many requests, we've learnt more about your twin turbo in the last 30 mins than in the last 2 years.
Mark, hope your health improves, it's more important to get yourself fit and 'up to speed' than your car.
We look forward to seeing you both out and about, Japfest?
We look forward to seeing you both out and about, Japfest?
twoforty
Well-Known Forum User
SKiddell said:
Better make sure I get some strong seats and a harness fitted then.
Steve, does your emerald ecu have a traction control option?
I know the MS doesn't but it could be done by fooling the ecu the an overboost condition has occured which in turn could kill spark, timing or both....Is TC allowed or is that cheating
Would be very esy to fit the sensors to the rear of a ZI'd be happy with 13 secs
twoforty
Well-Known Forum User
Mark, Thanks for sorting the injector blocks for me,
I'll keep you updated on the progress. Old engine should be out next week which will give me a chance to clean up the engine bay. I have pretty much everything I need now...got to make a custom loom from the ecu to the injectors etc.
Look forward to seeing your TTurbo....what is the saying? "Turbos are like balls, Get a pair"
I'll keep you updated on the progress. Old engine should be out next week which will give me a chance to clean up the engine bay. I have pretty much everything I need now...got to make a custom loom from the ecu to the injectors etc.
Look forward to seeing your TTurbo....what is the saying? "Turbos are like balls, Get a pair"
240z
Club Member
Great to see you car coming along so quick - puts my minor developments to shame!
When you are talking HP though are you talking at the wheels, hub or flywheel?
Also make sure you have plenty of time/money for mapping, it makes a WORLD of difference!
The 1/4 is definitely an art that needs practice, I'm lucky in getting a good couple of 60fts, but need to learn consistency, hats off to people like skiddell an pmac! Need to practice those quick gear changes too, I should be able to make up .1/.2 sec per change after seeing the data we got from the JTuner thrash.
Keep up with the good work, and will be interesting to see how the turbo behaves, any idea what rpm it'll get positive boost, and full boost?
When you are talking HP though are you talking at the wheels, hub or flywheel?
Also make sure you have plenty of time/money for mapping, it makes a WORLD of difference!
The 1/4 is definitely an art that needs practice, I'm lucky in getting a good couple of 60fts, but need to learn consistency, hats off to people like skiddell an pmac! Need to practice those quick gear changes too, I should be able to make up .1/.2 sec per change after seeing the data we got from the JTuner thrash.
Keep up with the good work, and will be interesting to see how the turbo behaves, any idea what rpm it'll get positive boost, and full boost?
twoforty
Well-Known Forum User
Hi Phil
I'd like 350 at the wheels but what I'd like and what I'll be able to get with out blowing the thing apart is another matter. I have the LM-1 wideband which is going to be a great help getting the fueling right. MS will pretty much tune it self when connected to the LM1.
As for boost, I've talked to a few Guys in the sates with Holsets and they all say they spool up very quickly 2300 upwards full boost by 3000
How's your car coming along, did you get the paint sorted?
Cheers
I'd like 350 at the wheels but what I'd like and what I'll be able to get with out blowing the thing apart is another matter. I have the LM-1 wideband which is going to be a great help getting the fueling right. MS will pretty much tune it self when connected to the LM1.
As for boost, I've talked to a few Guys in the sates with Holsets and they all say they spool up very quickly 2300 upwards full boost by 3000
How's your car coming along, did you get the paint sorted?
Cheers
240z
Club Member
I've found quite a lot can be done with the timing as well, which I've found certain 'tuners' are unwilling to touch. If it is safe, they like to keep it that way - which is a little bit frustrating.
My car is getting the split wastegate turbo downpipe fitted this week, then will be back to the paint shop to repair the damage caused by the thieves.. (quote was about 2 grand
)Just want to make sure I actually get to drive the car this year!
I'm interested in the turbo as I can get a t3 manifold quite cheap, but the single conversion is way down the line of priorites at the moment. full boost by 3000 is very impressive.
What injectors are you going with?
Wish I had a nice wideband though.. good luck with it all!
twoforty
Well-Known Forum User
2k! should look good!
Injectors? Supra 440cc like the one shown in my gallery, good for about 450bhp, going to run a couple of 3/8 fuel lines from the tank.
Holset is a UK company and you can by a new hy35/ he351cw for about £500 which for the spec is pretty good. I paid $400 for my turbo and its brand new.
there are a few smaller models....I think some 4cyl guys are using the hx30 with good results.
Do you know of a good source for wastegate acctuators? the one on it is 18psi....I want something like 7psi and from there up I'll use the electronic valve to up the boost
should look good!Injectors? Supra 440cc like the one shown in my gallery, good for about 450bhp, going to run a couple of 3/8 fuel lines from the tank.
Holset is a UK company and you can by a new hy35/ he351cw for about £500 which for the spec is pretty good. I paid $400 for my turbo and its brand new.
there are a few smaller models....I think some 4cyl guys are using the hx30 with good results.
Do you know of a good source for wastegate acctuators? the one on it is 18psi....I want something like 7psi and from there up I'll use the electronic valve to up the boost
Mr.F
Inactive
Traction control can only work by cutting power - the time you lose from this can't be regained within a quarter mile. I've seen cars capable of running 13 second quarters lose up to a second when using factory non-adjustable TC. On the 350 the ESP kicks in quite agressively losing huge chunks of time.
Aftermarket traction control is usually adjustable - a well-known Z32 drag participant found that dialling in just 2% on his RaceLogic system was the highest point that showed any advantage over self control...
Aftermarket traction control is usually adjustable - a well-known Z32 drag participant found that dialling in just 2% on his RaceLogic system was the highest point that showed any advantage over self control...