Any forced induction Hemi Problems?

Discussion of the 5.7L-6.1L-6.4L HEMIs.

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Vince
Posts: 2
Joined: Tue Feb 07, 2006 6:41 pm

Any forced induction Hemi Problems?

Post by Vince »

The real question is any forced induction hemi problems due to the 5.7s plastic intake manifold? I am running 5psi boost on my setup and have already blown an intake manifold BUT my dodge dealership replaced it under warranty (you heard it right, turbo still mounted) stating that they only did it cause early production hemi's had a problem with this regardless of boosting (problem is only in early 2003 as far as I understand). So, now I got the updated model, but I am wondering if I am going to look at another blown plastic intake when I start running 8+psi (Turbo XS dual boost controller). Thanx for your responces guys.

Vince
2003 4x4 Hemi Ram
STS Turbo Kit
Autometer Boost and EGT
Innovate Motorsports LM-1, LMA-3 and XD-1 for tuning on my SMT6 (currently in the process of installing)
2"/4" Drop
hemifever
Posts: 99
Joined: Mon Dec 01, 2003 7:04 pm

Post by hemifever »

One of my STS buddies up north had an intake blow. His truck was flaky before he put the turbo on and then after it just got worse. Apparently he had a cracked intake that the turbo finished off.

That's the only intake issue I've heard of. I run 8psi in high boost and have for almost a year. My other f/i friends have been doing the same w/o issue. Not that YOURS will be fine, but the intake issue hasn't shown its head much.
1971 Plymouth Cuda - 451 stroker
2003 QC 4x4 Dodge Hemi - STS Turbo, KRC 6005 heads & rods, Ross pistons, 6.1L crank & cam, ARP main/head studs, JBA headers, SMT6, APS converter: 575rwtq/492rwhp @ 9psi
2005 Chrysler 300c
kenihemi
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Joined: Sun Feb 19, 2006 5:11 pm
Location: Central NJ

Post by kenihemi »

I talked with the guy in Mass. that blew the intake and had an STS turbo (he was my customer and bought the STS from me).

He was in vacuum when it blew and was not on boost prior, so the turbo had nothing to do with it.
04 QC, 4X4 Hemi Ram, STS turbo
450RWHP/500+RWTQ
MEANGENE75
Posts: 60
Joined: Tue Apr 20, 2004 2:01 pm
Location: TEXAS

Post by MEANGENE75 »

working at a chrysler dealership ill back up the intake cracking even in stock form. have replaced 2 of em.
04 hemi, sc, sport, red, 3.92 posi, 22" wheels, flowmaster cat back, mopar long tube headers, srt 10 hood, mopar cod air,cold air duct, hypertech, ground force drop, sirius radio, momo sub, tint, 180 thermostat, silverstar lamps, mopar bed cover.
MG42pillbox
Posts: 194
Joined: Mon Jul 14, 2003 7:29 pm
Location: Phoenix AZ

Post by MG42pillbox »

Might as well Change your intake and heads to the 6.1L Engines top end set up. Thatway you will have a bullet proof intake and maybe even 50 more RWHP.
One whose life is Infecting others with Falsehood, shall fall greater than any of their Victims.
hemifever
Posts: 99
Joined: Mon Dec 01, 2003 7:04 pm

Post by hemifever »

Gotta be careful with the 6.1 heads and f/i. Those heads are about 10cc less chamber size so you'll end up with about .8 or .9 more compression. Good for n/a, but not the right direction for f/i when you're already at about 10:1.
1971 Plymouth Cuda - 451 stroker
2003 QC 4x4 Dodge Hemi - STS Turbo, KRC 6005 heads & rods, Ross pistons, 6.1L crank & cam, ARP main/head studs, JBA headers, SMT6, APS converter: 575rwtq/492rwhp @ 9psi
2005 Chrysler 300c
MG42pillbox
Posts: 194
Joined: Mon Jul 14, 2003 7:29 pm
Location: Phoenix AZ

Post by MG42pillbox »

hemifever wrote:Gotta be careful with the 6.1 heads and f/i. Those heads are about 10cc less chamber size so you'll end up with about .8 or .9 more compression. Good for n/a, but not the right direction for f/i when you're already at about 10:1.

Your right, better change pistons. 8.2 to 1 forged. 8)
One whose life is Infecting others with Falsehood, shall fall greater than any of their Victims.
grnfsh
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Joined: Fri Jan 19, 2007 10:08 pm

Post by grnfsh »

i have read and actually know one guy who have grenaded engines using a supercharger. One guy blew his engine all over the highway. Leaned out real bad. Number one cylinder.
2006 Charger R/T
2005 Ram 1500 Hemi
1970 plymouth Cuda 440
hemidup
Posts: 88
Joined: Fri Sep 29, 2006 9:47 am

Post by hemidup »

grnfsh wrote:i have read and actually know one guy who have grenaded engines using a supercharger. One guy blew his engine all over the highway. Leaned out real bad. Number one cylinder.
Was that engine from a car?
392 Blown Hemi
grnfsh
Posts: 5
Joined: Fri Jan 19, 2007 10:08 pm

Post by grnfsh »

Yes, a magnum RT
2006 Charger R/T
2005 Ram 1500 Hemi
1970 plymouth Cuda 440
hemidup
Posts: 88
Joined: Fri Sep 29, 2006 9:47 am

Post by hemidup »

I take it he was running a GSM kit as well. That's a pretty common failure with using an auxillary fuel injector setup on a dry intake. On cars with the front mounted throttle body, the #1 or #2 cylinders are the leanest and ussually fail. On trucks with the rear mounted throttle body, it's the #7 or #8 cylinder that goes. Did he get his RT back up and running yet?
392 Blown Hemi
grnfsh
Posts: 5
Joined: Fri Jan 19, 2007 10:08 pm

Post by grnfsh »

Yes, it is running again, I saw him a few months ago, and yes it was the GSM SC. Other SC kits use larger injectors, i think that is the way to go on these engines to keep them from leaning out.
2006 Charger R/T
2005 Ram 1500 Hemi
1970 plymouth Cuda 440
hemidup
Posts: 88
Joined: Fri Sep 29, 2006 9:47 am

Post by hemidup »

Tell him to use the SMT6 with 8 larger injectors. I'm currently running two 58b deadhead fuel pumps with 8, 55lb injectors and 2, 48lb auxillary injectors to keep up with my fuel demands. I also pitched out the dry flow intake and went with the 5.7 MP crate intake as well. W/M is also a must. :wink: Don't let him blow another motor with his intake.
392 Blown Hemi
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