Hi guys
what do you think about this engine...
b18c darton 82mm
pro 1 cams
6266 1.00 a/r twin scroll
stock head porting or 4 piston ( or someone else)
the car is more drag races and some street(fun) races..

 

whats your power goal? a 1.8 liter wont see full boost til about 6500-7000rpm with that hotside. For 650-850 hp that should work well. anything less than 650ish could use a smaller exhaust housing. a .82 A/R 6262 can make upward of 650 no prob

 

My goal is to try to maximize this turbo with water methanol or vp import...The theory told 1.00 a/r on twin scroll is 0.82 on single open...(I am not sure if is true)!

 

that turbo is prob good for around 800 on vp import. maybe a little more with an alcohol fuel

 

Well it depends on the setup but I've seen the 6266 and 6270 make over 1000whp. Joe over at Locash ran an 8.4 with the 6270.

 

thats wild.. im guessing over 50psi?

 

I think he was around 45 to 48. Obviously lot's of good parts were being used though.

 

For the Garrett custom Locash was at about 47psi. The problem was wheel flex and couldn't make anything over 906whp.

 

What do you think guys about porting or not head?

 

That's a pretty standard "700 - 800 whp" setup. Make sure you have a good intake manifold along with it. In theory the divided 1.00 is similar to a 0.8x undivided yes. Don't go too big on the turbo manifold runners - that's one of the main reasons people lose a ton of spool. A stainless-steel V-band inlet 0.82 will also work nicely.

The sweet spot of a 62mm setup is 5500 - 9500 rpm.

 

thank you for your info...I have victor x with 70mm throttle
if I use a 4 piston head or similar you think I will lose a lot on midrange?

 

a ported head will probably help a little bit

 

The Garrett Custom was on my car and I think it made close to 940whp but like you said the custom wheel would flex and eat the blades. That was the journal bearing Garrett as well, the BB Garrett Custom didn't make as much because the custom wheel was a bit thicker.

Joe runs the Precision stuff and still runs it today, he has run the 6266, 6270 which he set an FIS record with, the 6785 and the 7285. He has run an 8.39 with the 6785 which for AZ is wild when you think these passes are made typically at 90 degree temperatures and about 3500 plus elevation DA's.

 

That's what I remember, yes...In addition to the BB not making as much power, it really wasn't due to wheel thickness as it was the turbine wheel profile. Let's just say, that's something that's in the works of being changed.

Joe might be calling it a wrap, he's getting ready to set up shop at his home in an effort to not burn out, and do this on his own schedule.

 

Well Joe isn't calling it a wrap, he's just doing something that financially makes sense. Instead of renting multiple shops, building a shop on your property is a pretty smart move.

Joe lives up the street from me and his new shop setup is pretty dang nice in comparison to having to drive 35 miles one way to get to work.

 

That's true, But you have to admit it is comforting to Still have the choice to say Yay or Nay to projects without having to worry about rent.

 

Exactly why I book personal events rather than open a brick and mortar restaurant. lol!

 

Some people have had great success with untouched P72 and PR3 heads, whilst others see great gains with a ported head. I wouldn't imagine the 4Piston head would hurt mid-range too much, generally a lot of R&D goes into CNC heads before they are 'mass produced'. If you wanted to stay on the milder side, something like a 'pocket port' from Port Flow Design might be a good and cheaper alternative.

Make sure you have good headstuds - Speedfactory L19 or ARP CA625+ if plan on pushing the 6266 to make max power (will require a fair amount of boost).

 

Setup looks perfect.
Youll need the thicker version piston pins and a brave rod / rod bolt combo.


You will not loose mid. You will gain mid because a) the engine will be stronger before the spool. 2) You will ride less on the surge line/ be deeper on the compressor map once the turbo starts to spool.
If we were talking mid like 4000rpm you wouldnt see a change. But mid with this setup is like 6500 haha.

 

thank you for your reply

I have cp with upgrade pins and Manley turbo tuff with 625+ bolts...midrange I mean 6000-7500...

 

Thank you good info

 

Port flow design in Malaysia? I couldn't imagine the shipping hassles on that. I suppose nothing worse than maybe shipping to/from the U.S. *shrug*

 

I mean honestly if this is mainly a drag car you won't be spending a lot of time at 6000 rpms. During a pass once I launch I'm not going below 8500 the entire time.

 

On Point, there...

 

Without a strain gauge setup/dog engagment/no lift shift/10k rpm per shift........the Op's setup will likely dip in the 6K-7k territory between certain shifts.