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View Full Version : What HP can stock SRT rods take?



turbovanmanČ
01-09-2009, 09:38 PM
Are they lighter than our turbo rods?

SoCalCSX
01-10-2009, 12:21 AM
Seems to be plenty of SRT's making in excess of 400whp on stock bottom ends........

black86glhs
01-10-2009, 12:26 AM
Probably more than you will make.:p;)

turbovanmanČ
01-10-2009, 04:24 AM
Does anyone know how much they weigh?

t3rse
01-10-2009, 04:57 AM
640 hp is the record thus far on a stock bottom end...they are stronger than eagle rods

Ondonti
01-10-2009, 08:09 AM
you didnt buy that 35r so it doesnt matter ;)

mario03SRT
01-10-2009, 08:55 AM
VMan,

For an SRT engine that will be fairly grenade free and run for more than a summer of abuse, 425-450 is about the practical limit. All things considered especially a good tune.

glhs727
01-10-2009, 11:07 AM
I have seen 3 srt motors with the rod busted and a hole in the case. 1 was at the 500 whp level, but the other 2 were on the cars that were only pushing about 300 whp. I run eagle rods in my srt-4 now. The stock rods are NOT strong rods. maybe not weak either but I wouldn't use them on my TD thinking they were some kind of upgrade.
later,
Cindy

spoolinhard
01-10-2009, 12:11 PM
Just as long as everything is properly setup, they should be good for some serious HP. I dont think the stock 2.4 bottom end gets enough credit.

turbovanmanČ
01-10-2009, 03:18 PM
They are not the for the van, just bouncing idea's for my R/T ;)

Ok, so they look ok, is that with stock rod bolts?

Still, anyone weighed them?

Aries_Turbo
01-10-2009, 04:08 PM
just run stockers with ARP bolts and shot peen and beam polish them. if reeves hasnt broken them yet then you may have a chance of not breaking them ;)

Brian

turbovanmanČ
01-10-2009, 04:15 PM
just run stockers with ARP bolts and shot peen and beam polish them. if reeves hasnt broken them yet then you may have a chance of not breaking them ;)

Brian

Like I said, mulling over some options, ;)

Trying to figure out how to go 2.5 or even 2.4 on the cheap, :eyebrows:

contraption22
01-10-2009, 05:51 PM
I don't think anybody has ever blown up an otherwise Stage 3 setup, which you can say is safely in the 360+ range, but like anything else, they can break at much lower horspower levels if you do something stupid.

You can go 2.5 or 2.4 on the cheap if you use stock TII rods.

Directconnection
01-10-2009, 08:35 PM
Simon.... going the cheap always bites you in the arse.

Stay with the T-III rods w/arps and resize them.

turbovanmanČ
01-10-2009, 08:37 PM
Simon.... going the cheap always bites you in the arse.

Stay with the T-III rods w/arps and resize them.

Not at all, ;)

I don't see how using SRT rods is cheaping out, ;)

Directconnection
01-10-2009, 08:51 PM
Ok, then your frugal arse is spending moeny on rods you do not need with the SRT rods when you have stout T-III rods to begin with. Is your DD R/T going to make 500+ whp? ;)

turbovanmanČ
01-10-2009, 09:01 PM
Ok, then your frugal arse is spending moeny on rods you do not need with the SRT rods when you have stout T-III rods to begin with. Is your DD R/T going to make 500+ whp? ;)

No, but your missing the point, pistons my friend, :thumb:

black86glhs
01-10-2009, 09:25 PM
Dude, your thinking too much....again....lol. Seriously, are you just looking at the rods or are you looking at rods and then getting pistons to make a 2.4 or 2.5 out of your R/T engine?

turbovanmanČ
01-10-2009, 09:25 PM
Dude, your thinking too much....again....lol. Seriously, are you just looking at the rods or are you looking at rods and then getting pistons to make a 2.4 or 2.5 out of your R/T engine?

Yeah, I only said that a few posts ago, sheesh, :eyebrows:

black86glhs
01-10-2009, 09:33 PM
Yeah, I only said that a few posts ago, sheesh, :eyebrows:I missed it. I don't know the 2.4, can you put the rods on the 2.2 piston?

Aries_Turbo
01-11-2009, 01:17 AM
so what kind of silliness are you trying to do? use SRT pistons/rods in a 2.5L bottom end with a TIII head slapped on top?

pics of both pistons and rods please :)

Brian

turbovanmanČ
01-11-2009, 01:45 AM
I missed it. I don't know the 2.4, can you put the rods on the 2.2 piston?

No, SRT rods and pistons in 2.5 CB with a TIII head, :thumb:


so what kind of silliness are you trying to do? use SRT pistons/rods in a 2.5L bottom end with a TIII head slapped on top?

pics of both pistons and rods please :)

Brian

See above, I haven't got any yet, trying to see if I can make the 2.4 stuff work to save me buying new forged pistons.

I am going to try and pull some favours too see if I can borrow a rod and piston. I know the head chamber is bigger on the Neon head but maybe there is enough meat I can mill the piston top down a bit or with a 2.5 crank, they might sit lower in the bore. If it doesn't work, meh, then I have to buy some new pistons, :(

Nothing ventured, nothing gained. :thumb:

t3rse
01-11-2009, 03:11 AM
SRT rods are an upgrade over Eagle rods...ask the neon guys that don't blow up perfectly fine motors

turbovanmanČ
01-11-2009, 03:13 AM
SRT rods are an upgrade over Eagle rods...ask the neon guys that don't blow up perfectly fine motors

Your saying Eagle rods are sh*t?

t3rse
01-11-2009, 03:14 AM
:amen:

Ondonti
01-11-2009, 03:15 AM
If you continue to tune your car like you do, its a horrible idea.

If you dont, they could be great for 500whp.

Removing material from the piston is a bad idea though.

turbovanmanČ
01-11-2009, 03:52 AM
If you continue to tune your car like you do, its a horrible idea.

If you dont, they could be great for 500whp.

Removing material from the piston is a bad idea though.

Thanks, :o

From the pics, the SRT pistons have a dome, I need a flat top, there should be MORE than enough meat to skim down but again, until I get ahold of one and do some mock up, I won't know if its possible.

I just want a cheap way to make my R/T a 2.5. Right now, I am soooo broke so unless I can figure something for cheap, I can't afford to get it running this year.

turbovanmanČ
01-11-2009, 04:34 AM
SRT rods are an upgrade over Eagle rods...ask the neon guys that don't blow up perfectly fine motors

Why do you say Eagle rods are bad? I haven't heard of anyone breaking some?

Austrian Dodge
01-11-2009, 06:18 AM
horrible balance and the need for "after"-machining is enough for most people to avoid them ;)

turbovanmanČ
01-11-2009, 01:54 PM
horrible balance and the need for "after"-machining is enough for most people to avoid them ;)

I know about the machining, lucky I have a machine shop on retainer. ;) I had mine balanced, they were pretty close.

Aries_Turbo
01-11-2009, 10:58 PM
Right now, I am soooo broke so unless I can figure something for cheap, I can't afford to get it running this year.

i dont know the condition of the car.... why not just do 2.2L. then you dont have to do some bastard combination of parts to get a 2.5L crank in there. does cindy have used TIII slugs still? she used to. t2 rods and a 2.2L crank and you wouldnt have to spend hardly any money.

brian

turbovanmanČ
01-12-2009, 01:24 AM
i dont know the condition of the car.... why not just do 2.2L. then you dont have to do some bastard combination of parts to get a 2.5L crank in there. does cindy have used TIII slugs still? she used to. t2 rods and a 2.2L crank and you wouldnt have to spend hardly any money.

brian

The car came with the short block, it just needs freshening up, but I want to go 2.5 and if its coming apart, then might as well do it right the first time. I have the crank already, so just trying different options. If it doesn't work, then I have to sell a boat load of parts or get super busy at work, :thumb:

snoman
02-05-2009, 02:21 AM
lets keep this going....
I was thinking the same thing, but instead of tiii I am going hybrid
One thing, I can't find big end size on a stock rod?!
if the rod will fit the crank I am going this route, 2.0/2.4 share the same bore size 87.5 and I have even found 8.5:1 neon slugs with a comp hgt (pin set) of 1.4 compared to a 1.38 on a 2.5 and 1.54 on a 2.2
I am looking for maybe a 9:1 to see if I can find a closer comp height to my 2.2


so will they fit our crank?

turbovanmanČ
02-05-2009, 02:26 AM
The SRT rods are the same length as our engines, the big end is also the right size but use SRT rod bearings. The wrist pin is .866, ours are .901. Not sure if there is enough meat to machine out the SRT rods to accept the larger pin.

Theoritcally, SRT rods and pistons should work with a DOHC head, the only issue I could see would be the piston hitting the head OR the compression being a tad high.

I need to go thru my piston specs and see what is what.

As for me trying this, It looks like I sold the R/T, so no need for me to pursue this adventure, :o

snoman
02-05-2009, 02:40 AM
so, I am thinking alum rods and find some decent slugs
I am thinking srt all the way to avoid wrist pin issues
I am still hording parts but I am hoping to hit the track late april/may...then tune tune tune
maybe I can pimp out a dyno somewhere, theres a couple in town now
I really need to compile all this for the KC.

Aries_Turbo
02-05-2009, 10:05 AM
hmmm i wonder what the deck height of the 2.4 is compared to the 2.5L.

Brian

turbovanmanČ
02-05-2009, 01:46 PM
hmmm i wonder what the deck height of the 2.4 is compared to the 2.5L.

Brian

Exactly, I think they will work, but I think some minor milling of the piston top will be needed for clearance. The TIII has a larger chamber than a Neon head.

Aries_Turbo
02-05-2009, 01:50 PM
well i was thinking more along the lines of 2.4L SRT slugs in a 2.5L engine with 2.4L head. dunno if there is enough deck height though.

Brian

turbovanmanČ
02-05-2009, 01:53 PM
well i was thinking more along the lines of 2.4L SRT slugs in a 2.5L engine with 2.4L head. dunno if there is enough deck height though.

Brian

I would think again, that milling some off the piston top would work, they are a wedge shape so to me, they would be thick enough. I might pursue this if I find some SRT slugs for cheap, I have enough cranks/blocks etc around to mock it up.

snoman
02-05-2009, 03:10 PM
it should work.... the piston comp height is lower on the neon piston
theoretically it should sit lower in the block
that is if the rods are the same length.. which is what I am seeing
deck height on a 2.4 is 238.14mm as per sport compact somethingerother
what is it on ours?

mario03SRT
02-05-2009, 03:28 PM
I would think again, that milling some off the piston top would work, they are a wedge shape so to me, they would be thick enough. I might pursue this if I find some SRT slugs for cheap, I have enough cranks/blocks etc around to mock it up.

As long as you stay @ 9si or less just run the long block as is with the stock ecu. It will run very snappy! Or buy a shim for the head. Why frankenstein something that no one ever will ever be able to service/repair?

turbovanmanČ
02-05-2009, 03:34 PM
As long as you stay @ 9si or less just run the long block as is with the stock ecu. It will run very snappy! Or buy a shim for the head. Why frankenstein something that no one ever will ever be able to service/repair?

Why would anyone service or repair my vehicles? :confused:

Why only 9 psi? The SRT guys run 15-20 psi on stock stuff.

snoman
02-05-2009, 03:38 PM
thats the whole point.... if they are straight drop in the aftermarket is almost endless

plus for what I am wanting 9 psi wont cut it!
I'm not looking for a quick dd Mine is a balls out go for broke deathtrap

mario03SRT
02-06-2009, 11:32 AM
[quote=turbovanman;439370]Why would anyone service or repair my vehicles? :confused:

Duh on me. I thought that this was a 2.0 SRT turbo swap. Nevermind.:lol:

turbovanmanČ
02-06-2009, 02:32 PM
Duh on me. I thought that this was a 2.0 SRT turbo swap. Nevermind.:lol:

Nope, trying out some idea's, you know, we are cheap, sometimes, :lol: