Cylinder head mods - LotusTalk

toysport · 01-27-2009, 06:08 PM

thinking of having my cylinder head ported/polished, do you need a tune for it to keep like a/f ratio with in range? thanx

ZAMMY1 · 01-28-2009, 07:51 AM

and, second, do we have an agreement as to who should do the head work?
sam

Bavarian Motorist · 01-28-2009, 08:11 AM

You will need a tune to maximize output.. I doubt it would do anything except throw a code without a tune. I haven't tried it so my opinions only based on my discussions with knowledgeable ones. Basically, if you are making changes that actually make an appreciable difference, ie enough to produce more power, you need a tune. Charlie said that once.

andrewgotanelise · 01-28-2009, 10:05 AM

boosted 2.0 can port and polish anything you throw at him, and for tuning im pretty sure charliex can handle anything you throw at him too

dustylax · 01-28-2009, 12:09 PM

i dont know what you have in there already but if you are having this work done w/the head off it would be smart to do the supertech valves and valve springs for added safety and slightly more power.

MaineLotus · 01-28-2009, 12:33 PM

Not much to be gained with a port/polish. Expensive for little, if any, gains.

jim-clayton · 01-28-2009, 12:44 PM

Quote:

Originally Posted by MaineLotus

Not much to be gained with a port/polish. Expensive for little, if any, gains.

I heard the same info a while back. After looking at a stock head I agreed there wasn't much to be gained. However, I recently saw some flow numbers
before and after porting. There was a nice increase. The ported head also produced more hp on a dyno. The info was from someone I trust so it has me thinking.

turbophil · 01-28-2009, 01:56 PM

Quote:

Originally Posted by jim-clayton

I heard the same info a while back. After looking at a stock head I agreed there wasn't much to be gained. However, I recently saw some flow numbers
before and after porting. There was a nice increase. The ported head also produced more hp on a dyno. The info was from someone I trust so it has me thinking.

+ 1 to Jim.

I had heard what Maine said before from Gary at MWR, but then heard that Boosted and Kris both have had some good success with porting...

Taking their word for it that the porting is helping the head flow and unleashes some power, then it's a good mod even for a blown engine. More NA power is a good thing! It will still need tuning and Charles in Charge of that for the OEM ECU...

Best,

Phil

toysport · 01-28-2009, 04:14 PM

thanx for all your prompt reply guys, appreciate it very much. i'm changing my clutch/flywheel that's why i was planning to do some head mods while the engine is out. i have a bwr sc for 8 months now and i'm wondering with the port/polish if it will throw my a/f ratio way off that i'll need a custom tune for it? thanx everyone and i'm ready for power upgrade Phil.

turbophil · 01-28-2009, 04:17 PM

Quote:

Originally Posted by toysport

thanx everyone and i'm ready for power upgrade Phil.

Cool, Happy to help. Just gimme a ring/email/PM when you're ready and I'll be happy to help...

Good luck!

Phil

toysport · 01-28-2009, 04:32 PM

correct me if i'm wrong Phil but did you released your tvs sc already?

Bavarian Motorist · 01-28-2009, 04:37 PM

Quote:

Originally Posted by turbophil

Cool, Happy to help. Just gimme a ring/email/PM when you're ready and I'll be happy to help...

Good luck!

Phil

Hey, I'm ready too. Call me!

Bavarian Motorist · 01-28-2009, 04:37 PM

Quote:

Originally Posted by toysport

correct me if i'm wrong Phil but did you released your tvs sc already?

The hardware is all done. He's just waiting on the re-flash to be completed. So if you have an EFI or intend on a customized tune, you can buy it now.

toysport · 01-28-2009, 05:34 PM

b. motorist i know you have been talking about this efi but what is it really and what does it do? sorry for my ignorance.

Bavarian Motorist · 01-28-2009, 05:41 PM

No prob... Better to ask than to appear like a dummy like I do

It's a standalone ECU that replaces the factory ECU. It allows you to completely customize your tune and various settings by yourself. Has a ton of features.

toysport · 01-28-2009, 06:05 PM

thanx for the clarification b motorist. do you have an efi and what brands are usually popular in this kind of application? and how hard is it to tune? thanx a million.

Bavarian Motorist · 01-28-2009, 08:45 PM

I don't have one, but many do. Turbophil for one

What do you mean by "what brands"? EFI is the brand. Sorry if I wasn't clear, or maybe I'm not understanding.

How hard is it to tune in terms of what? I haven't used one, so I won't comment.

...m... · 01-28-2009, 09:17 PM

Quote:

Originally Posted by Bavarian Motorist

It's a standalone ECU that replaces the factory ECU. It allows you to completely customize your tune and various settings by yourself.

...i thought EFI piggybacked the lotus ECU, not replaced...

Bavarian Motorist · 01-28-2009, 09:22 PM

Quote:

Originally Posted by ...m...

...i thought EFI piggybacked the lotus ECU, not replaced...

Nope. It's a standalone.

Boosted2.0 · 01-28-2009, 11:02 PM

Quote:

Originally Posted by MaineLotus

Not much to be gained with a port/polish. Expensive for little, if any, gains.

I strongly disagree, especially with the new intake manifold.

01-27-2009, 06:08 PM	#1 (permalink)
toysport Registered User Join Date: Mar 2007 Posts: 43	Cylinder head mods thinking of having my cylinder head ported/polished, do you need a tune for it to keep like a/f ratio with in range? thanx

01-28-2009, 08:11 AM	#3 (permalink)
Bavarian Motorist Live to Drive Join Date: Nov 2006 Location: NYC/Westchester, NY Posts: 10,850	You will need a tune to maximize output.. I doubt it would do anything except throw a code without a tune. I haven't tried it so my opinions only based on my discussions with knowledgeable ones. Basically, if you are making changes that actually make an appreciable difference, ie enough to produce more power, you need a tune. Charlie said that once. __________________ Be an alpha male. Drive a Lotus.

01-28-2009, 10:05 AM	#4 (permalink)
andrewgotanelise MMA Fighter Join Date: Apr 2007 Location: Where the drugs are cheap and the girls are easy Posts: 1,203	boosted 2.0 can port and polish anything you throw at him, and for tuning im pretty sure charliex can handle anything you throw at him too __________________ 05 NFB Elise / Katana SC / No Snorkle / 3.2 "10" psi pulley / Stage 1 Exhaust / Decat / Green Filter

01-28-2009, 12:09 PM	#5 (permalink)
dustylax 2.0-6262 Join Date: May 2007 Location: NY Posts: 437	i dont know what you have in there already but if you are having this work done w/the head off it would be smart to do the supertech valves and valve springs for added safety and slightly more power. __________________ Please PM if you need anything, i am working from home now.

01-28-2009, 12:33 PM	#6 (permalink)
MaineLotus Parts scattered about... Join Date: Feb 2005 Location: Maine Posts: 1,374	Not much to be gained with a port/polish. Expensive for little, if any, gains. __________________ My car is modified.

01-28-2009, 07:51 AM	#2 (permalink)
ZAMMY1 ZAMMY Join Date: Jan 2007 Location: washington, pa, (near PGH.) Posts: 1,557	and, second, do we have an agreement as to who should do the head work? sam

01-28-2009, 04:14 PM	#9 (permalink)
toysport Registered User Join Date: Mar 2007 Posts: 43	thanx for all your prompt reply guys, appreciate it very much. i'm changing my clutch/flywheel that's why i was planning to do some head mods while the engine is out. i have a bwr sc for 8 months now and i'm wondering with the port/polish if it will throw my a/f ratio way off that i'll need a custom tune for it? thanx everyone and i'm ready for power upgrade Phil.

01-28-2009, 04:32 PM	#11 (permalink)
toysport Registered User Join Date: Mar 2007 Posts: 43	correct me if i'm wrong Phil but did you released your tvs sc already?

01-28-2009, 05:34 PM	#14 (permalink)
toysport Registered User Join Date: Mar 2007 Posts: 43	b. motorist i know you have been talking about this efi but what is it really and what does it do? sorry for my ignorance.

01-28-2009, 05:41 PM	#15 (permalink)
Bavarian Motorist Live to Drive Join Date: Nov 2006 Location: NYC/Westchester, NY Posts: 10,850	No prob... Better to ask than to appear like a dummy like I do It's a standalone ECU that replaces the factory ECU. It allows you to completely customize your tune and various settings by yourself. Has a ton of features. __________________ Be an alpha male. Drive a Lotus.

01-28-2009, 06:05 PM	#16 (permalink)
toysport Registered User Join Date: Mar 2007 Posts: 43	thanx for the clarification b motorist. do you have an efi and what brands are usually popular in this kind of application? and how hard is it to tune? thanx a million.

01-28-2009, 08:45 PM	#17 (permalink)
Bavarian Motorist Live to Drive Join Date: Nov 2006 Location: NYC/Westchester, NY Posts: 10,850	I don't have one, but many do. Turbophil for one What do you mean by "what brands"? EFI is the brand. Sorry if I wasn't clear, or maybe I'm not understanding. How hard is it to tune in terms of what? I haven't used one, so I won't comment. __________________ Be an alpha male. Drive a Lotus.

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