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> Bigger Throttle Body, Bigger Injectors?
Glock23
post Sep 16 2008, 06:28 PM
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Anyone know how to do this? Might help us a bit.
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LePapirrikY
post Sep 16 2008, 07:14 PM
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lets say this better
you wont feel any improvement if you have your car stock, you first need to change I/H/E, cams, injector and then you may wanna change for BBTB(Big Bore Throttle Body), but leave that at the end.

This post has been edited by LePapirrikY: Sep 16 2008, 07:56 PM
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Glock23
post Sep 16 2008, 07:52 PM
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One of the mods on here said that Member RogerHoldorf in Norway has the Alpha II DOHC 1.6 liter engine, but in a Tiburon. He decided not to go turbo, and has become our default expert on the limits of NA modification of the Alpha II engine. Roger has a 40 horsepower gain over stock with Crower cams, header, SRI, custom cylinder head work, ported and polished intake manifold, running an adjustable fuel regulator and 2.0 liter Elantra injectors

I think this guy if he ever gets back on here could help us. Also hopefully we can find out for our selves if these parts will fit our engine. I think they should.
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Canuck_2005
post Sep 16 2008, 08:16 PM
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QUOTE(Glock23 @ Sep 16 2008, 07:52 PM)
One of the mods on here said that Member RogerHoldorf in Norway has the Alpha II DOHC 1.6 liter engine, but in a Tiburon. He decided not to go turbo, and has become our default expert on the limits of NA modification of the Alpha II engine. Roger has a 40 horsepower gain over stock with Crower cams, header, SRI, custom cylinder head work, ported and polished intake manifold, running an adjustable fuel regulator and 2.0 liter Elantra injectors

I think this guy if he ever gets back on here could help us.  Also hopefully we can find out for our selves if these parts will fit our engine.  I think they should.
[right][snapback]190872[/snapback][/right]


Dont we have a member on here who achieved 40 horespower gian over stock with just an SRI, Header, Exhuast, and some amsoil :)
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Glock23
post Sep 16 2008, 08:39 PM
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Just got an email from roger most of this I don't totally understand as I'm just getting my hands dirty when it comes to engines.:

I would love do help you with all information I have got. BUT I am not quite sure my engine is quite like your. In Norway Tiburon comes with 1,6 liter DOHC engine 10:1 in compression It is called G4D 107HP and 77KW. On my car Crower San Diego has regrnd cams They us part number 65014JB
Intake Opens at -7 degrees After Top Dead Center (TDC)
Intake Closes at 25 degrees after Bottom Dead Center (BDC)
Exhaust Opens at 33 degrees Before Top Dead Center (BDC)
Exhaust Closes at -15 degrees Befire Top Dead Center (TDC)
Lobe Seperation 110 degrees
Duration at .05 inch open (1.2 mm)
Intake 198 degrees
Exhaust 198 degrees
Lobe Lift
Intake .310
Exhaust .310
My slope ratio 1.00 intake and 1.00 exhaust.
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GotAccent?
post Sep 17 2008, 06:33 AM
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wow if that is a custm regrind then our stock cams must really suck.... actually looks more like a turbo cam profile. if it were me i would want some major overlap and alot more duration. with the cvvt i think you could get away with it and stil have a decent idle and some good top end gains.
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Glock23
post Sep 17 2008, 06:44 AM
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So you actually know what all of that means? Care to explain and maybe into detail about new cams? Btw he doesn't have turbo and doesn't want it :)
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Tango2Go
post Sep 17 2008, 10:47 AM
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QUOTE(GotAccent? @ Sep 17 2008, 08:33 PM)
wow if that is a custm regrind then our stock cams must really suck.... actually looks more like a turbo cam profile. if it were me i would want some major overlap and alot more duration. with the cvvt i think you could get away with it and stil have a decent idle and some good top end gains.
[right][snapback]190946[/snapback][/right]

That is some very short duration.I am used to V-8'S WITH 268-292 DEGREES OF DURATION AT .05 LIFT.
No a lot of lift either considering it is a direct lift.
Very conservative considering only 22 degrees of overlap.
That explains the better results with the SRI compared to the CAI.
Also reinforces the idea of not going too big on the exhaust in order to maintain the siphon effect of scavenging.
I would have expected a dual pattern with longer duration and higher lift on the intake. :beer:
Glock having a short duration in which the valves are lifted off the seats means you have a very short time to get air in and out of the cylinder,therefore responding better to forced induction.
overlap=the time both valves are open at the same time,more able to maintain constant flow of air through heads.Exhaust helps pull in intake air ,intake helps push out exhaust gases.Longer and shorter is better to an extent .After that you will lose some cylinder pressure due to overscavenging or lack of cylinder fill.
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GotAccent?
post Sep 17 2008, 12:42 PM
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QUOTE(Tango2Go @ Sep 17 2008, 10:47 AM)
That is some very short duration.I am used to V-8'S WITH 268-292 DEGREES OF DURATION AT .05 LIFT.
No a lot of lift either considering it is a direct lift.
Very conservative considering only 22 degrees of overlap.
That explains the better results with the SRI compared to the CAI.
Also reinforces the idea of not going too big on the exhaust in order to maintain the siphon effect of scavenging.
I would have expected a dual pattern with longer duration and higher lift on the intake. :beer:
Glock having a short duration in which the valves are lifted off the seats means you have a very short time to get air in and out of the cylinder,therefore responding better to forced induction.
overlap=the time both valves are open at the same time,more able to maintain constant flow of air through heads.Exhaust helps pull in intake air ,intake helps push out exhaust gases.Longer and shorter is better to an extent .After that you will lose some cylinder pressure due to overscavenging or lack of cylinder fill.
[right][snapback]190970[/snapback][/right]

there you go glock :) would prefer 240 - 250 durtion at 50 and about 550 to 600 lift i dunno if that is possible because of the valve to piston clearance. maybe i read it wrong but from my understanding from what that guy posted there would be a "negitive" overlap actully no overlap at all. how many degrees does the cvvt increase the overlap?
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Komptek
post Sep 17 2008, 02:59 PM
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I know it's a bit extreme and off topic but if yoru looking at doing that much work to get some power out of hte 1.6L why not just beta swap. Most of that work has been done or is being done now to the 2.0L so you would have more power and more resources for the motor. I've been thinking of going this way since there is a lot more out there for the 2.0L engine. As long as your not looking at Turboing the swap should fit pretty easy.
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Glock23
post Sep 17 2008, 04:22 PM
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we need AC. 2 baby's to deal with
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Glock23
post Sep 17 2008, 04:43 PM
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Another email from Roger:

Hi!
I bought a head for my engine from US. It was for 1,6 liter DOHC Accent. Shaved it as much as possible Crower rebuilt cams and porting and polishing. and mounted on my car. Didn't compare the two heads before mounting. But looking at it now it looks like my origin head is lower than this Accent head. But I have ordered a very thin cobber gasket to the head of my car and then I am going to compare the two heads and then we know a lot more.
A bit of what I have done with my engine:
The head as you know. Cold air inlet. Inezama ignition wires and indium NGK spark plugs Sun Auto Inazama HG, Porting and polishing air inlet manifold. Thicker electrical wiring. And added some earth wires, mounted adjustable fuel pressure regulator. rebuilt fuel pump filter regulator assembly. I can get more than 6 Bar pressure, mounted 2 liter fuel nozzles. disconnected By pass heater for throttle body, mounted 2 liter OBX headers. That's about it. The engine runs very well. I am happy with it.
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GotAccent?
post Sep 17 2008, 08:00 PM
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i dont know how you would mount a fpr because we dont have a return type fuel system. i would like toknow though. sounds like he is saying that he used beta headers and fuel injectors.
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Tango2Go
post Sep 18 2008, 01:22 AM
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QUOTE(GotAccent? @ Sep 18 2008, 02:42 AM)
there you go glock :)  would prefer 240 - 250  durtion at 50 and about 550 to 600 lift i dunno if that is possible because of the valve to piston clearance. maybe i read it wrong but from my understanding from what that guy posted there would be a "negitive" overlap actully no overlap at all. how many degrees does the cvvt increase the overlap?
[right][snapback]190972[/snapback][/right]

Imay be misunderstanding it but I think,
Intake Opens at -7 degrees After Top Dead Center (TDC)would be the same as +7 degrees BTDC. and Exhaust Closes at -15 degrees Before Top Dead Center (TDC)would be equal to+15 degrees after TDC .You add the two together and it is 22 degrees overlap.
Again I may be wrong,but I'm pretty positive that the intake valve always opens before TDC so as to allow the valve to start lift early allowing full charge.Also the exhaust always closes after TDC to make sure all gases have time to evacuate the cylinder.This is where exhaust scavenging takes effect.
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Glock23
post Sep 18 2008, 10:27 AM
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I think thats what he means too hopefully he will post
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