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Performance, Brainstorming & Tuning Talk about modifications, or anything else associated with performance enhancements. Have a new idea for performance/reliability? Post it here. No idea is stupid! (please use Detailing and Appearance for cosmetic ideas)

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Old 08-30-2006, 11:48 AM   #1
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Default adding power to an L27

i found a mod list to a member/moderator which claims to have had the fastest L27.

I would like to replicate that and if possibly could go a few steps further.
I also have a few questions, and maybe you guys could shine some light on why
certain modifications are done.

RSM slotted rotors with ceramic pads. (would be nice to have, but i dont think its a need??)
Short Ram air intake (i have a regular cool air intake. should i go 4")
MSD coils (i will get some shortly)
MSD 8.5mm wires ](i have 8mm.. should i upgrade to 8.5?)
NGK TR6 plugs (i run TR55 whats the difference?)
Superchip EPROM chip (this is custom made right? )
Dynomax CAT (im going to delete this cat- would this get me better performance?)
Dynomax muffler (i got a flowmaster 80 )
Full custom exhaust (does this mean he got a u-bend delete? or a bigger downpipe?? or both??)
DP 160amp alternator
180 T-stat

i also noticed he did not have following which are available for the L27
PEMs
Ceramic coated EMs
Performance cam
headers?? (whats headers?)
different gear ratio and tranny mods.


he did not have them because it wouldnt work with this setup??
what will have to be done to the tranny to support this??

My goal is to have the fastest L27 daily driver possible.
But i need your help- anyone that helps me can come to montreal for beers on me!!
my goal is to have everything done by the end of next summer, maybe the summer after that.
i will get a cheapy camera to post progress pics.

thanks everyone for your time.
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Old 08-30-2006, 12:27 PM   #2
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Default Re: adding power to an L27

Quote:
Originally Posted by 94BonnieSE
i found a mod list to a member/moderator which claims to have had the fastest L27.
.
he was on the Bottle, the fastest (non "boosted" L27) is 15.7
Personally i would NOT waste my time on the NA.....for all the money that you would put into the car you might as well swap in a Series One L67 and go fasterfor cheaper
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Old 08-30-2006, 12:41 PM   #3
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Quote:
Personally i would NOT waste my time on the NA.....for all the money that you would put into the car you might as well swap in a Series One L67 and go fasterfor cheaper
It wouldnt be a waste of time at all. I would learn almost everything i want to learn.
and i would get to say "I have the fastest l27 in canada".
Plus it would prepare me to mod any other ride i get. (currently looking)

as for money.. i dont think im going to spend anywhere over 2,000$.
well if you include the tranny then yes i might spend close to 3,000$
3,000$ for a year, year n half, two years of mod work, is not much.

Plus the Big Bruise is got minimal rust.
Before i had any tools, i would take both my rides to shops..
for the dodge i had no offers
for the bonnie, two mechanics offered to buy it, for more than i paid for it.
so it tells me something there.

thanks for your time 1993 SLE..
luv that 00+..hope the curse goes nowhere near ya.

edit: no problem on running juice here, i found a nice DIY set up for 500$.
The dodge is on its lasts breaths, thats why i choose to mod the bonnie.
Poor dodge wont last me till next year. Funny thing when i bought it.. i was told
it was an RT.. which does 230HP 230tq... hhahaaha.. i had no idea wut a blower was..
so yeah i got scammed!!!.. raped with no lube.
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Old 08-30-2006, 01:24 PM   #4
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Default Re: adding power to an L27

I added my comments in the following quote:

Quote:
Originally Posted by 94BonnieSE
RSM slotted rotors with ceramic pads. (would be nice to have, but i dont think its a need??) I ran the first 'test' pair of these rotors. RSM'* customer service is the only thing worse than their rotors. Go with Powerslot. They use Brembo blanks.
Short Ram air intake (i have a regular cool air intake. should i go 4") Not SHORT ram. That'* bad for laminar flow, velocity, and heat. Go all the way to the headlight.
MSD coils (i will get some shortly) Don't do it unless you have bad coils. It'* not much of a gain. Perhaps under 5hp.
MSD 8.5mm wires ](i have 8mm.. should i upgrade to 8.5?) Waste of money. The thickness is in the insulation, not the conductor. Get Belden 7 or 7.5mm wires from NAPA.
NGK TR6 plugs (i run TR55 whats the difference?) You don't need to adjust heat ranges, as you're not boosted. TR55 should work fine at .060".
Superchip EPROM chip (this is custom made right? ) They didn't get many good reviews. Allmachtige had one in the Red Rocket, and wasn't impressed.
Dynomax CAT (im going to delete this cat- would this get me better performance?) Maybe a little. Less for you than an L67. Might not feel it, or you might.
Dynomax muffler (i got a flowmaster 80 ) Little to no performance change.
Full custom exhaust (does this mean he got a u-bend delete? or a bigger downpipe?? or both??) We don't have a u-bend. And running without a cat is illegal, regardless of whether your state tests for emissions or not. It'* a federal law, and deleting it will kill some of your low-end torque.
DP 160amp alternator DP is a SCAM. He'* a major ripoff. Go to www.mralternator.com for the alternator. It has more power, but will rob about 5hp to run the thing.
180 T-stat

i also noticed he did not have following which are available for the L27
PEMs DIY
Ceramic coated EMs DIY
Performance cam
headers?? (whats headers?) Not available
different gear ratio and tranny mods. Custom
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Old 08-30-2006, 01:58 PM   #5
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Honestly other the the basics ( Cold Air, some exhaust) there'* not much you can do to it.

The Rockers aren't much of a difference IMO for $400+, a cam would help, but the Series 1 valvetrain doens't have much room for improvement (bigger valves, etc). A PCM could help, but to get any reasonable gain in HP you'll need to run premium.

Headers would be nice, but they'll have to be custom, ours have nice individual flow from the factory, but don't do much with scavenging. A high flow cat will help on our older cars that've clogged up their cat some.

NItrous is an option, so is doing a SC Swap (you'll need to know the ins and outs of the engine management/wiring) turbocharging is an expensive option, but may have the most potential after good tuning. Boost is really the only way to make significan't more power due to the restictions of the Intake manifolds and the heads on our engines.
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Old 08-30-2006, 02:29 PM   #6
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Quote:
Originally Posted by BonneMeMN
Boost is really the only way to make significan't more power due to the restictions of the Intake manifolds and the heads on our engines.
exactly
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Old 08-30-2006, 02:57 PM   #7
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Thanks BonneMeMN, WillWren, 1993 SLE.. this has helped me alot.

Seems like everything i wanted to do is not possible,
thats what i needed some clarification on.

some more questions

I have a CAI that goes to the headlight.. but its 3", any gains in making it 4"?


Quote:
We don't have a u-bend. And running without a cat is illegal, regardless of whether your state tests for emissions or not. It'* a federal law, and deleting it will kill some of your low-end torque.
do we have any bend at all?? .i dont think my pipe goes from the cat to the muffler straight.
The car just passed inspection and it wont have to again till 2014.
I know i dont want to cut the cat.. but it is cheaper than buying a highflow one.
i will think that one through.

any gains from a bigger downpipe?

i know how a cam works, but what makes a cam better than another?


Quote:
BonneMeMN wrote:
Boost is really the only way to make significan't more power due to the restictions of the Intake manifolds and the heads on our engines.


exactly
not quite ready for that. But i do understand.
I guess i dont want to have the fastest L27 , i just want to make mine faster and learn
in the process.

thanks guys.
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Old 08-30-2006, 03:06 PM   #8
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The cam will be a requirement if you want quicker than the average modded L27.

A 4" intake will hurt you. I'm running a 2" pulley on a Gen3 M62, and can't outflow my 3". A 4" stepping down to your TB diameter would cause turbulence and cost you flow.

I ran a short period of time with no Cat on my SLE (L67). Due to needing the car ASAP, and not having the replacement in hand yet. I lost a noticable amount of bottom end. And didn't gain anything on the high end. It sucked.

Get a hi-flow. Change the muffler for sound, not performance. Get a cam, and improve your intake. Have your EM'* stitch-welded and ported. You should be in good shape at that point.
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Old 08-30-2006, 03:29 PM   #9
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Quote:
PEMs
headers?? (whats headers?)
What the? This strike anyone else as redundant? Why bother with ported exhaust mani'* when you got headers? It'* one or the other.
The only things that are going to be adding power would be the intake/exhaust stuff. Most of the other junk is just support stuff.
I'd be surprised if everything on that list got a net gain of 15hp.
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Old 08-30-2006, 03:49 PM   #10
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Quote:
What the? This strike anyone else as redundant? Why bother with ported exhaust mani'* when you got headers? It'* one or the other.
The only things that are going to be adding power would be the intake/exhaust stuff. Most of the other junk is just support stuff.
I'd be surprised if everything on that list got a net gain of 15hp.
I think you must have misread. I was asking what headers was.
im still not 100% sure. but i will do a search.
15hp is not alot, but i am trying to duplicate what a member here had before,
(he was also juiced) just as long as i can accelerate faster and reach my redline faster. Plus my main goal is to be faster than other L27s not to be
faster than everything.
Thanks for your time smellbird,if you have any suggestions for my setup any advice will help.

Quote:
Get a hi-flow. Change the muffler for sound, not performance. Get a cam, and improve your intake. Have your EM'* stitch-welded and ported. You should be in good shape at that point.
will do cam, cat, pems,pcm,
what about Fuel injectors?
anyone changed the gearing on a 4T60E?

thanks a sh*t load guys...
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