HOW MUCH BOOST ON STOCK LS RODS?

[B18DELSWOL]

I have a b18b1 with wiesco 9:1 pistons. cant realy afford aftermarket rods this minute, and was wondering how much psi will the stock ls rods hold up till? 8-10psi? is there anything i can do to make the rods stronger? i will use arp rod bolts. the machine shop is pressuring me to let them know so they can put the bottomend together.(warranty) well thanks...

 

[92civicb18b1]

It can handle 8-10 but just to be safe I wouldn't go past 7. I'm assuming this if it was a t3 turbo. You can't just throw out numbers without telling us which turbo. Since your shortcutting, don't be surprised if something unexpected happens.

 

[B18DELSWOL]

sorry, im gonna go with the greddy kit. i do have access to a dyno and plan to use a hondata s200. is 250whp in reason?

 

[posol]

psi is meaning less.

an 18g greddy kit at stock boost and a hondata, you will be more than fine.

275 whp is common.... just don't try to over-rev it.

 

[beerbongskickass]

Originally posted by 92civicb18b1@Sep 9 2004, 09:02 PM
It can handle 8-10 but just to be safe I wouldn't go past 7. I'm assuming this if it was a t3 turbo. You can't just throw out numbers without telling us which turbo. Since your shortcutting, don't be surprised if something unexpected happens.

[post=388255]Quoted post[/post]​

Lol, what the hell are you talking about? Don't go past 7 psi just to be safe? Yeah okay haha... I have been running 10 psi (about 215whp) on my stock d16z6 for 7 months and my rods are fine (I will be running 12-14 psi at the track, I am a little worried at 14 psi, but I think I will be fine if it's just at the track). I have a buddy that ran 14 pounds daily (18g turbo) on his stock ZC for a while and his rods were fine. I know a lot more people that have been running 200+ whp on d-series motors for a while without any problems. The b-series rods are a lot bigger than d-series rods also, so they can obviously hold more power. The LS rods because of their design are weaker (rods bolts are the weak point) than the B16/GSR rods, but they can still handle a good amount of power. This guy even has upgraded ARP rod bolts, the rods will hold up fine.

 

[Sil VurFoX]

I've been running 12.5:1lb of boost on a stock "LS" bottom end for quite a while it all comes down to the tunning. If you are lean at any point the detonation can rattle the rod bolts loose and make a rod come out to breath fresh air. Be smart and tune it, and don't over rev it. If you have it apart.. put good rod bolts in it.

 

[posol]

12.5:1 pounds of boost? what the fuck?

 

[GSRCRXsi]

maybe 12.5 compression with 1 lb of boost? lol

 

[Sil VurFoX]

sorry.. should have said 12.5lb of boost on a stock "LS" engine is perfectly fine as long as it's tuned. I pushed 15lb of boost on a stock "LS" and made 340whp.. crappy down pipe, SSAutoChrome exhaust mani, apexi, and my hondata for about 3 months hard driving / not racing. Put it back on the dyno pushed 17lb.. went lean and cracked the cylinder bore on #2 about 1.5" down from the deck surface. No block guard, sleeve work, or pistons.. you get what you deserve.

 

[99SiRidinLow]

As long as you don't get greedy and stay around your 250 mark you should be good