wotagr8bigchief

iTrader: (1)

I'm trying to choose between the SC42 & the 321t for my classic, I have searched right through the threads regarding both turbos I cant find anyone running the 321t without avcs on a 2.0. I know the 321 is going to spool later than the 42 but by how much?
Answers on a postcard

RICHARD J

iTrader: (4)

I run an MDX321T which is the latest billet version of the T on my V3 STI with no AVCS. It's not laggy atall on the road. Look at the Area52 mapping thread for my graphs & for a comparison against a newage with AVCS look at CraigyPs graph too.

banny sti

iTrader: (68)

Not quite an MD321T but very similar on a forged 2 litre running 1.7bar

wotagr8bigchief

iTrader: (1)

Thanks for that guys, the avcs doesn't seem to make much difference looking at the graphs? What sorta revs are you hitting a bar at on the road Rich and what revs for full boost? I may be getting slightly confused with the model number of the turbo, on laterals website the md321t is a billet 450 bhp capable turbo, I see no mention of a mdx321t?
Is that a billet or non billet md on your graph banny?
I personally don't mind a bit of lag but my local track is lydden hill, small with lots of corners and I don't want to be furiously changing gears to keep it on boost if I can help it! Brief spec: v9 crank & rods with mahle pistons, sti3 heads, gt2 headers with harvey 3 bolt up-pipe, hdi gt2 fmic, alcatek, exhaust still to buy but was thinking 3" h&s all the way if I went for the sc42 or 2.5" for the md, 6 Speed carbon synchro dccd box (uk) Am also only running 11mm arps at the moment, not sure if they are capable enough for the md? Thanks for you help/opinions guys, really need to get this nailed down as its the last piece of the puzzle before it can all go back together.

banny sti

iTrader: (68)

That was a non billet turbo, the ARP studs will handle the MD just fine.

Boost graph