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fast spooling 600whp street turbo?

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My thoughts exactly. I ran an S258 in the .70 open T3 and made 479whp on straight pump and stock engine, saw 28psi by 5k. A friend's S362 setup with a JMF divided T3 mani and .85 hotside saw 35psi by 4800 and made 708whp on E85. Another friend's S362 with the .76 divided hotside sees 25psi under 4k, hasn't cranked it up yet though.

I had some exceptional results in both the BEP DSM bolt on housing and the bigger BW twinscroll T3 housing.

S259ETT in the big Twinscroll T3 with a set of factory freak Graveyard Motorsports cams. Jon told me the set I received were the first made of the 274s, but the measurements my machinist pulled from them are far bigger than advertised.

With Snow Performance meth kit saw full boost 37-38psi around 4600rpm in third in cold weather.

Link saw 63+lbs/min routinely.

This was with the larger 74mm turbine.
 
Holset is a cheap effective way to go IMO. I know a buddy used to run on an HX40 with the BEP. 55 housing and was full boost around 4500rpms on a built 2.0L on E85 was upper 500whp. I would imagine if you used the stock twin scroll housing spool would be a tad quicker and will get you your 600whp.

As mentioned though it's hard to have a quick spool high HP car but of course can always be done.
 
Fastest spooling is kind of ambiguous.

Just because it spools faster doesn't mean it makes more power.

In reality the faster the spool usually means the faster the fall off on the top end giving you less usable overall power (area under the curve).

Maybe that's ok if you never twist it out on the top end.

Like everything else, there are trade offs.

In reality the difference in spool time is pretty negligible and people change their driving styles as needed.

Hal
 
Ok fast spooling 600hp turbo? Try Hx40 in a stock 14cm housing.i see 30 psi right under 3k rpm with hks 280s. 2.0 e85

You see 30 psi under 3k? That has to be the fastest spooling HX-40 2.0 setup ever. That thing spools like a dang t25.

What gear is this in that you see 30 psi under 3k?
 
The fp2 are just repackaged comp101200 cams. The comp101200's are slightly more aggressive than 272's .... you know say like 274's. Sounds to me like you just bought some 274's but from a different company. Kudos to the smooth talking sales rep.

Ya which is why I swapped the 274's out for some fp2's as Graveyard even told me that their cams are meant for really high rpm power bands. Thing pulled hard up top but low-mid was not so good. New cams should move my power band back down and tuning will be better this time to help spool.


Btw I have comp 264-272. It should spool nice.
 
The fp2 are just repackaged comp101200 cams. The comp101200's are slightly more aggressive than 272's .... you know say like 274's. Sounds to me like you just bought some 274's but from a different company. Kudos to the smooth talking sales rep.




Btw I have comp 264-272. It should spool nice.

Fp2's are not 274's and I didn't buy them from a sales rep, I bought them from a private seller. A did my research on the cams and the Graveyard 274's are actually more aggressive than they say. There is a thread on here about the Graveyard cams and a machinist took the specs of the cams and figured out they were more aggressive than claimed. And everyone that I have heard from that run the Graveyard 274's have had major issues with low-mid range.

I looked at dyno graphs and talked to people running the fp2's with a similar setup to mine and their low-mid range was a lot better. I did research before selecting a cam and know these are far better cams compared to the Graveyard regrinds.

The fp2's are designed for a 2.0 motor and the 274 are designed for a stroker motor like a 2.3, tell me how those two cams would be similar?
 
No need to go try and dig something up, but if you happen to find it please post it up.

Just been a while since I've logged the car or tuned. Netbook is fired up, so I should have one in a few

Found it :)

1800 rpms positive intake manifold pressure in 3rd gear, and 50 lbs / min at 20 psi
 

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hi, thats rommel holset short log... 27 psi by 3900 rpm untuned. we tuned the car a few weeks later and we ran out of fuel at 25 psi, turbo was flowing 52 lbs a minute.

i will look for a complete pull and post it as soon as i find it.
 
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Fp2's are not 274's and I didn't buy them from a sales rep, I bought them from a private seller. A did my research on the cams and the Graveyard 274's are actually more aggressive than they say. There is a thread on here about the Graveyard cams and a machinist took the specs of the cams and figured out they were more aggressive than claimed. And everyone that I have heard from that run the Graveyard 274's have had major issues with low-mid range.

I looked at dyno graphs and talked to people running the fp2's with a similar setup to mine and their low-mid range was a lot better. I did research before selecting a cam and know these are far better cams compared to the Graveyard regrinds.

The fp2's are designed for a 2.0 motor and the 274 are designed for a stroker motor like a 2.3, tell me how those two cams would be similar?

If its the thread I think you are referring to, that was my particular set of GM274s and they were an anomaly in how ungodly off spec they ended up.

Jon told me that the sets I received included the first pair of 274s and the first set of 272s they got from their cam grinder up the street.

The rest they've since sold are going to be pretty close to advertised because they pair I had were so large and so off spec it could create major problems for someone to install straight up on stock cam gears without measuring valves and using stock springs.

So dont get too excited, yours will likely be only .408 lift, and a decent ramp rate, not exactly an fp2x or a kelford 280/276. LOL
 
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