87silverbullet

iTrader: (11)

Stock compression is 9.4. The 243's will bring it to 10:1 with a stock gasket. I will have to ask my business partner, the motor is actually his, but its just sitting there.

Tjabo

In the spirit of denmah, please implement option #3 and let us know how it works out. Even if you have to add a little boost to it because of loss of a little compression, this is still by FAR the best option. You'll actually be able to add a lot of boost and have way more power... What's not to like! lol

HRHohio

If you opt for #3, you may want to pick up a $10 gram scale and check the difference in weight between old and new.
http://www.harborfreight.com/1000-gr...ale-97920.html

It may help you match up your pistons without the need for a machine shop to re balance everything. Just a thought...

stangtrader

iTrader: (2)

Option 3 may end working fine if the weight is not too far off.i know people go to ls2rods and pistons on lq4 motors with out balancing all the time

stock48

iTrader: (17)

Factory lq4 and lq9 pistons are ~470 grams. Early style rod is ~608 grams, later HD rods are ~648 grams. Usually you can go lighter on piston, and rod combo by around 30~40 grams without issue but more than 20 grams over factory can cause problems without adding to bob weight.

narfdanarf

We have gone lighter by a lot when switching to aluminum rods....stock untouched crank and making well into the four digits.

87silverbullet

iTrader: (11)

Street car dude.

Aluminum rods don't work in this situation.

People have made 4 digits with untouched bottom ends.

o2camaross

iTrader: (2)

How much you want for that LQ4?

HRHohio

I think he was just saying that going lighter isn't a bad thing... not implying that he should swap rods to Alu. That's all.

OldGold

iTrader: (1)

Ok, so let's see...original rods and pistons would have been 1078 grams.

New style rods and JYD pistons would be 1090 grams.

So, that is right on the money.

Decision made! I could not find the specs on the rods and pistons, thanks!

Mike

HRHohio

Well...... That was

adamantium

iTrader: (3)

My buddies 9 sec street car DSM has aluminum rods

87silverbullet

iTrader: (11)

1. Does he drive to work 30 miles everyday?

2. Is the motor more than a year old?

3. Does he race it more than twice a year?

4. Lets put 100k on the motor and see if they last.

5. If they're Groden's, tell you buddy good luck.

narfdanarf

completely off topic but: I wouldn't put grodens in anything, but I would have no issues putting a set of BME's in any streetcar....one of the biggest myths in the world is that aluminum rods can't be used in a street application.

and HRHOhio was right, I was not meaning by my comment that the OP should put new rods in his car...I was merely talking from a weight perspective.

adamantium

iTrader: (3)

Drive it as much as he can. He drives several hours round trp to the track runs 9s and drives back him. He has a daily cause E85 isn't vastly available by him. But the cars been together for a year already, been beaten on everytime it gets taken out. Doesn't get much action cause no one wants to dig an AWD auto on the street but everytime its out its because its going out for a race or track passes or to be stepped on. The vids with the manual gear box is from a year or so ago.














The guy who put his bottom end together has a DSM that has been together for ever (2-3 years) and it runs on spray and nitrous runs 8s and its on groden aluminum rods also.... lol no need to give him good luck, it runs just fine.

87silverbullet

iTrader: (11)

He must have a lucky set of Groden's then. They all spit the rod bolts out and cause all kinds of carnage.

If he can't get a race out there. Come up my way, we have good street prepped out 100 ft. No worry of the cops. Just ask Old gold how that street hooks.

adamantium

iTrader: (3)

I see what your saying, i agree to a certain extent. Ive always heard this about aluminum rods but lately ive been seeing it less and less, i think it just depends on the builder. Both of these guys have had great success with groden aluminum rods.

Last i talked to him i told him to look up state Fl since it seems like more people are interested in dig racing for $. Not sure if he's interested in driving 1000+ miles for a street race though. LOL.

87silverbullet

iTrader: (11)

I have been hearing its harder to get in touch with Keith (owner of Groden) and as of lately alot of guys are going to GRP, MGP, and BME rods because Groden's are failing and they are giving no warning. Guys are getting them checked and they check out ok. Put them back in the engine, 5 passes later Hope he has no such bad luck because they usually take the block with them when they let go.


That's the point though. If the price is right you will go almost anywhere. Boostedgt came down here with his mustang all the way from Dallas.

OldGold

iTrader: (1)

Hey, enough highjacking!

Back to my car, which will never, ever, ever get a set of aluminum rods, LOL.

Tjabo

Did you order those Wisecos? I for one am very excited to see how that works out! I hope they have matched the "stock" bore sized pistons properly to a factory piston (a thousandth smaller or something) so that you can truly just gap rings and drop them in.