Question about spool time on hx35/40 and 300zx. - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Daniyyel · 06-26-2013, 04:50 PM

Hello everyone. I have a question regarding what kind of spool time I'm looking at on a VG30ET. The car has tubular manifolds, ported and polished heads,+1mm oversized ferrera valves with 5 angle valve job and 30 degree backcut,280/intake 280/exhaust .450 lift cam, 2.5in IC piping, garrett intercooler 29'/8'/3' with 2.5 inlet/outlet and engine compression is 8:1 compression. I apologize for my lack of knowledge and did do alot of searching and learned a great deal about holsets but really didnt find anything regarding the spool time of a t4 .89 a/r on a 3.0 V6.

Heres is the link to the turbo that I purchased.
Dodge RAM Cummins Holset Turbo HX 35 40 Hybrid 62 65 12 turbocharger 12cm | eBay

Daniyyel · 06-27-2013, 05:15 AM

Guess I will be the first to report on this. Car is currently at friends shop while crankshaft is off to get shot peened, chamfered, micro polished, knife edged and balanced. Will report back with results in about 1 week.

Danial · 07-25-2013, 10:48 AM

Most people dont have turbo vg30E engines maybe thats why, but it sounds like it should spool quickly if honduhs are any indication

Is the exhaust manifold dividing the pulses for twin scroll? I believe the hx35 is a twin scroll turbo, and that will definitely improve spool

hows it coming?

jesse_s13 · 07-25-2013, 10:57 AM

You probably want to try
Z31performance forum for this question.

Daniyyel · 07-25-2013, 11:03 AM

Quote:

Originally Posted by Danial

Most people dont have turbo vg30E engines maybe thats why, but it sounds like it should spool quickly if honduhs are any indication

Is the exhaust manifold dividing the pulses for twin scroll? I believe the hx35 is a twin scroll turbo, and that will definitely improve spool

hows it coming?

Actually its a vg30et that came already turbocharged with a hideously small t25. I've actually just finished porting and polishing the heads. Ill post pics very soon and also have decided to go with BRC forged pistons instead of stock z32tt pistons because they are actually cast aluminum. All that's left is to order the pistons which I plan on as soon as I get a response back from brc because Im going with 8.0:1 compression and also I haven't purchased the intercooler yet. The turbo I purchased from what Ive read about the housing is actually a T3 twin scroll and a/r is around .63 so it should spool fine..might go with a bigger BEP housing. The exhaust manifolds merge and divide into the twin scroll.

Daniyyel · 07-25-2013, 12:09 PM

Quote:

Originally Posted by jesse_s13

You probably want to try
Z31performance forum for this question.

Yeah. I will. I haven't been on there in a while. Ill try there as well. Thanks

06-26-2013, 04:50 PM	#1
Daniyyel Join Date: May 2012 Location: Memphis Age: 31 Posts: 28 Trader Rating: (0) Feedback Score: 0 reviews	Question about spool time on hx35/40 and 300zx. Hello everyone. I have a question regarding what kind of spool time I'm looking at on a VG30ET. The car has tubular manifolds, ported and polished heads,+1mm oversized ferrera valves with 5 angle valve job and 30 degree backcut,280/intake 280/exhaust .450 lift cam, 2.5in IC piping, garrett intercooler 29'/8'/3' with 2.5 inlet/outlet and engine compression is 8:1 compression. I apologize for my lack of knowledge and did do alot of searching and learned a great deal about holsets but really didnt find anything regarding the spool time of a t4 .89 a/r on a 3.0 V6. Heres is the link to the turbo that I purchased. Dodge RAM Cummins Holset Turbo HX 35 40 Hybrid 62 65 12 turbocharger 12cm \| eBay Last edited by Daniyyel; 06-26-2013 at 06:17 PM..

07-25-2013, 10:57 AM	#4
jesse_s13 Nissanaholic! Join Date: Aug 2010 Location: Sacramento,CA/Fresno,CA/El Paso,Tx Posts: 1,829 Trader Rating: (5) Feedback Score: 5 reviews	You probably want to try Z31performance forum for this question. __________________

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06-27-2013, 05:15 AM	#2
Daniyyel Join Date: May 2012 Location: Memphis Age: 31 Posts: 28 Trader Rating: (0) Feedback Score: 0 reviews	Guess I will be the first to report on this. Car is currently at friends shop while crankshaft is off to get shot peened, chamfered, micro polished, knife edged and balanced. Will report back with results in about 1 week.

07-25-2013, 10:48 AM	#3
Danial Zilvia Member Join Date: Jun 2011 Location: Maryland Age: 31 Posts: 273 Trader Rating: (0) Feedback Score: 0 reviews	Most people dont have turbo vg30E engines maybe thats why, but it sounds like it should spool quickly if honduhs are any indication Is the exhaust manifold dividing the pulses for twin scroll? I believe the hx35 is a twin scroll turbo, and that will definitely improve spool hows it coming?