built vt stroker motor questions

ADRENLN

Active Member

Apr 16, 2003

2,342

3

49

NJ

Oct 19, 2006

#1

• Oct 19, 2006

• #1

ok, i still have a couple of calls to make before i decide to try a stroker or just get a reg. forged 4.6

one call to fox lake and one to my tuner/mechanic too see what they think with my set up.

anyway, i e mailed vt and they said stroker would be fine! they use 21cc will give me 9.2:1 compression. How is this for compression? is it low enough?

i will be running 12-15 psi and it has to run on pump gas.

if this compression is ok, how has my stage 2 ported heads influenced compression?

isnt there a change there or is it too minor to worry about?

thanks guys......thinking of ordering before the sale ends. if i miss it, ill just get the blower part of the set up first. tryin to save 500 bucks though.

 

CobraRed_96_GT

Active Member

May 20, 2006

1,421

4

39

UCSD/La Jolla

Oct 19, 2006

#2

• Oct 19, 2006

• #2

running that much boost at 9.2 comp. would require some pretty strong forged parts but it could be done

 

ADRENLN

Active Member

Apr 16, 2003

2,342

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49

NJ

Oct 20, 2006

#3

• Oct 20, 2006

• #3

hmmmm. wonder why he suggested that? maybe that was just an idea he was giving me. it was over email so i dont know, i thought it was his suggestion. what compression am i shooting for guys?

i know the stroker has a different set up choices as far as pistons and compression.

 

Warrior 102

New Member

Jan 22, 2003

231

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0

Macomb MI

Oct 20, 2006

#4

• Oct 20, 2006

• #4

I have 10.1.1 and my tuner/motor builder said 8psi on pump gas no problem at all,you can go 19psi whit a methanol injection,and make awesome power.

 

ADRENLN

Active Member

Apr 16, 2003

2,342

3

49

NJ

Oct 21, 2006

#5

• Oct 21, 2006

• #5

wow, thats high compression. i def want to go lower then 10.1.1

even with the intercooler. is 9 good or should i go down to 8?

what do you think will be better to run 12-14 psi through with the intercooler?

 

Warrior 102

New Member

Jan 22, 2003

231

0

0

Macomb MI

Oct 21, 2006

#6

• Oct 21, 2006

• #6

8.5.1 --9.1.1 compression for blower is weary good,you can run higher boost on the pump gas and make a good power...............
But i suggest to call Tim @ modular power house and talk to him for the best combo,here you gonna get different answers from different people and get confused.
Like I said call Tim@ MPH or call Scott @VT engines,you gonna get the best info from this guys.
Good luck.

 

R

RedGTvert

Founding Member

Nov 21, 1999

3,129

1

58

Wellington, FL

Oct 22, 2006

#7

• Oct 22, 2006

• #7

9.2:1 is fine for your boost proposed level. Now if you were thinking of running 20# plus, then I would consider lowering it, but you will do fine.

 

ADRENLN

Active Member

Apr 16, 2003

2,342

3

49

NJ

Oct 23, 2006

#8

• Oct 23, 2006

• #8

so i should be good with 9.2.1 at those boost levels.

you guys think im good with that compression untill 20 psi? i might try to add more boost down the road but never 20. highest would be 15. i have to see what boost levels i start out with on the 2.9 pully and go from there.

 

ADRENLN

Active Member

Apr 16, 2003

2,342

3

49

NJ

Oct 23, 2006

#9

• Oct 23, 2006

• #9

btw thanks for your response

 

VTEngines

New Member

Jan 29, 2003

180

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0

Michigan

Oct 29, 2006

#10

• Oct 29, 2006

• #10

The ONLY time I EVER build a blower motor lower than 9:1 is for KB guys. I build those @ 8.5:1. I would never go that low on a centri blower set-up.

 

Mike97gt

it doe snot

Founding Member

Jan 26, 1999

10,633

7

89

the people's republic of massachusetts

Oct 29, 2006

#11

• Oct 29, 2006

• #11

Well since the guy from VT says 9.2.1 and one other builder said that I think your question is answered. The only thing I would change if you have a few extra bucks is I would get a aluminum block sleeved and go big bore

 

hotmustang331

Active Member

Apr 29, 2004

2,967

3

48

Bastrop,TX

Oct 29, 2006

#12

• Oct 29, 2006

• #12

Since he already bought the motor, ill go ahead and hijack .

What compression do you guys normally do on DD turbo cars?