Modification Suggestions

1619 Views 28 Replies 10 Participants Last post by cdahl383, Jan 27, 2015

JTR18SHAKER

Discussion Starter · Jan 25, 2015

Hello, I have started to make a list of the "best bang for the buck" modifications for when spring rolls around. I have a (as far as I know) stock 2011 SRT8 6 speed. The only mod I have done is to install the extended MOPAR shift handle.

These were my next choices.

(1) MOPAR air intake
(2) front strut brace
(3) rear strut brace

I am really not convinced that a cat back exhaust would be that much better than the stock exhaust system that comes on an SRT8. But more investigation is required.

Any suggestions would be appreciated. Perhaps there is already a list and I missed it. Thanks

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Dodgeguy

· #2 · Jan 25, 2015

I would add a catch can to that list.

JTR18SHAKER

Discussion Starter · #3 · Jan 25, 2015

Thanks I'll have to investigate to find out what that is.

TexasRT

· #4 · Jan 25, 2015

Mods are typically driven by goals, do you have a vision of the car you want?

Speedlogix

· #5 · Jan 25, 2015

Here's my favorite starter mod list ...

- catch can
- skip shift eliminator
- tuner
- thermostat
- cold air intake
- catback exhaust
- front strut brace

We have a discounted package with a catch can, cold air, tuner, thermostat and catback in it for less than $1900 - http://www.speedlogixstore.com/product-p/sx-h1-lc61.htm

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JTR18SHAKER

Discussion Starter · #6 · Jan 25, 2015

Texas RT you bring up a good point. I bought this car used but top of the line, has all the factory options, tons of HP would more could I want? So I see a few mods that may be beneficial as they make sense to me. If I am looking for more HP why don't I just go directly to a supercharger? It is a possibility, but where do you stop? I am not looking to race, I really want the outside to be fairly stock, most emblems are deleted except for the 392 HEMI on the side quarter. Folks get awful close to me to see what it is. Also I look at things that I could do myself comfortably. I doubt I'll ever touch the computer settings I think that could be a recipe for disaster, although I am capable.

JTR18SHAKER

Discussion Starter · #7 · Jan 25, 2015

Thank you Lisa, I will consider these items. I am in Canada does that pose a problem for delivery?

jkelly16

· #8 · Jan 25, 2015

Tuner is the best bang for the buck, along with a Hemifever tune.

cdahl383

· #9 · Jan 26, 2015

Get a tuner with a Hemifever tune, you'll be amazed at how much better/stronger the car feels over stock. I've run a tune on my car for 3 years and never any issues. Just got the new Hemifever tune a few weeks ago and the car is totally awesome now, no more torque management hampering it.

Sounds like you're on the right track with bolt ons. Catch can, CAI, tuner, custom tune, and front and rear strut braces would definitely make the car faster and handle better. Supercharger is cool but obviously in a different league than minor bolt ons. Depends on your budget and goals.

TexasRT

· #10 · Jan 26, 2015

I have a long, long list of mods but the top 3 in terms of satisfaction were

1. Wheels
2. Lowering (Eibach Pro 1.7" drop)
3. Corsa Catback

Now, coincidentally these are not the cheapest mods.

I do run a "Johan" tune as well, and am a proponent of that versus the canned tunes.

wyo.hemi

· #11 · Jan 26, 2015

I agree with everyone above - Custom Tune/Tuner, Catback Exhaust, CIA

I think the window tint absolutely sets these beauties off especially on our black cars.

JTR18SHAKER

Discussion Starter · #12 · Jan 26, 2015

All great advice. Thanks!

Looking at the diablo, I see you can get canned tunes for 93, 91 octanes, but why not 94? We can get it at out stations here, well just one brand, it's a bargain right now.

JTR18SHAKER

Discussion Starter · #13 · Jan 26, 2015

Oh just a thought no one has mention a throttle body as a mod, BBK claims some modest HP gains with the 90 mm body. Thoughts?

TexasRT

· #14 · Jan 26, 2015

JTRSRT8 said:
All great advice. Thanks!

Looking at the diablo, I see you can get canned tunes for 93, 91 octanes, but why not 94? We can get it at out stations here, well just one brand, it's a bargain right now.

94 is probably rare, and in fact... a lot of folks end up at the 91 tune even when 93 is available (lot of threads on the net about that).

Your best bet is a custom tune, it would help properly deal with st knock based on your car /fuel.

large

· #15 · Jan 26, 2015 (Edited)

catch can :it takes out the oil the pcv is returning to your throttle body,worth every penny

cdahl383

· #16 · Jan 26, 2015

90mm TB will be too large for a relatively stock engine with just bolt ons. Biggest I would go with is 85mm. Even that probably won't yield much hp gain for the money spent.

When I ran the canned tunes I had the best luck with the 91 tune running 93 octane. When I ran the 93 tune on 93 octane I still got a fair amount of knock retard. The 91 just felt better and had less/almost no knock retard.

Getting a custom tune is the way to go though. Dialed in for your particular car based on datalogs from your car, can't get much better than that outside of a full dyno tune which is way more than an email tune. Unless you have crazy mods, an email tune will do just fine.

Catch can is a good idea as well. There's arguments for and against having one, lots of threads out there on that.

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Dodgeguy

· #17 · Jan 26, 2015

cdahl383 said:
90mm TB will be too large for a relatively stock engine with just bolt ons. Biggest I would go with is 85mm. Even that probably won't yield much hp gain for the money spent.

When I ran the canned tunes I had the best luck with the 91 tune running 93 octane. When I ran the 93 tune on 93 octane I still got a fair amount of knock retard. The 91 just felt better and had less/almost no knock retard.

Getting a custom tune is the way to go though. Dialed in for your particular car based on datalogs from your car, can't get much better than that outside of a full dyno tune which is way more than an email tune. Unless you have crazy mods, an email tune will do just fine.

Catch can is a good idea as well. There's arguments for and against having one, lots of threads out there on that.

The fact that the Hellcat has a PCV oil catch system built into the valve covers tells me it is a pretty good idea.

woodsman345

· #18 · Jan 26, 2015

If you install a tune, you are flying blind on the fuel-air ratio without a wide-band 02 . If I were you, I would get a tuner like a used Predator that has been reset or something to monitor knock and be able to make adjustments. A wide-band 02 sensor will read out your fuel air ratio which will change depending on the conditions. Knock is cumulative to the fatigue of everything in the engine that goes around and round. Stay with a Tier 1 gasoline like Shell V-Power if possible or whatever 93 produces the least amount of knock. I have good luck with V-Power with 11% ethanol. AJ Hemituner did my base tune for 50 pound injectors and it was near flawless. I had to add some fuel as the car went faster is about the only change I made. He is as good as there is out there. I have no experience with Hemifever but others here have had good luck it appears.
The guys on this thread are good guys and will steer you right, just thought I would add my 2 cents.
Good luck

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JTR18SHAKER

Discussion Starter · #19 · Jan 27, 2015

Well thanks again for your posts and from your answers and the supporting data I have found on the net, the addition of a catch can in our case seems to be warranted. I attached a simple diagram. I noticed that some cans have filters in them and that some return feeds go into the air filter first, not directly into the TB, interesting.

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cdahl383

· #20 · Jan 27, 2015

I've used tunes from both Johan at Diablosport and Sean at Hemifever and both were great tunes and great guys to deal with.

I think with supercharged applications you get a lot more blow-by due to much higher cylinder pressures in the engine so I can see why they installed a oil catch can type system in the PCV system on that car. Our cars probably don't produce half the blow-by the Hellcat does, but it still catches a lot of crap, so it seems worth it to me.

I've also had good luck with Shell 93 V-power in my car like Woodsman345 stated above. BP 93 also works well in my car. I datalogged with the latest Hemifever tune and got very little short term knock retard on Shell 93. I also get the best mileage out of the Shell 93 compared to other fuels.

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