Hey does anyone know what the redline for a SOHC VTEC engine is?
Thanks for your time.

 

what type of car? it is most likely 7200 rpms. the best way to find out is to drive and shft into second and just carry second until your car hits the rev limiter. it won't hurt your car.

 

go to hybrid honda and then hit specs and it should tell ya wait try this link and if it doesn't work clikc swap tech info , then click engine specs. http://hybrid.honda-perf.org/tech/engine.html

 

I have a 90 civic hatch that I just bought with a SOHC VTEC transplant. I has an Si trans and the complete engine. The Si ecu was used and the autometer vtec controller is set at 5k. Now the guys installed the Si cluster and I'm wondering if that's the redline on this engine. I'm assuming not, but I'm not sure. Also does anyone know how to tell if the VTEC is engaging. I can feel my VTEC in my 99Si, but not in this one. Please help my guys, this is new stuff for me.

 

ok wait they have an Si trans> as in the new si or the old one and the same goes for the computer. and what year civic is the engine out of?

the redline is 7200 probably if you would have clicked the link i gave u it tells you that

 

0oh and on soch you can't feel it as much, trust me i have drove both. it just gets a little kick it is probably working you just aren't used to it

 

Ok. Let me clarify some of this stuff. I have a 95 SOHC VTEC engine in my 90 Civic. It has the Si trans for the D-series. Also the Si ECU for the EF. Is that enough?

 

So I actually need a aftermarket tach so I can know where to shift. Also how would I determine if the VTEC is actually kicking in?

 

ok listen to me carefully the redline, 7200. if you have the SI ecu for the 88-91 honda civic Si then that would be the reason you have no vtec. you need the ecu from the year your engine is

 

what does your tach rev too now? and look at my last post for the vtec part

 

I believe the redline is 6500 and the max is 8K. Also although I don't have the ECU with the VTEC, I have a Autometer VTEC controller that is supposed to make the VTEC kick in at 5K. I'm just wondering if there is any way that I can actually check to see if the VTEC does kick in. The reason I ask is because my brother has a CRX Si with a Iceman intake and no muffler and It feels stronger than my car. Also the rest of my mods are FPR, Intake, JG header, and cat back exhaust. By the way thanks for taking the time and helping me Trinity.

 

LISTEN TO ME THEREDLINE IS 7200 RPMS. I GAVE YOU THE LINK TO LOOK AT THE SPECS. ok i am not getting that pissed but i am telling you what the redline is ok. for YOUR engine. the only way i can think of is a dyno to see if it is kicking in. there should be a curve where it kicks in at.

 

Thanks Trinity. I'm actually at work and can't see the certain sites or I would of looked there. Thanks for the info. My next step is taking it to a dyno.

 

ok sorry ti seem all bitchy, but listen there is a way you can test to see if it comes on, by a light. i don't know what way or how it works but a friend of mine ( rioninja) does and he will post it to tell you how i think

 

I know who you're talking about. I bought some shocks from him.

 

I have the same set up in a 89 civic hb....95 sohc vtec, si tranny, 89 si ecu, and vtec controller. If you have a 88-91 ecu the redline will be 7200 or 7300. You could check if the vtec is kicking it by just taking off the vtec or setting it higher. When I set my vtec higher I could hear it kick in, but it's not that noticable, it just gets a little louder.

 

Hey what kind of VTEC controller do you have?

 

Here's the deal: 89-91 CRX ECU redline is at 6800rpms, fuel cut is at 7200rpms
SOHC Vtec ECU: redline 7200rpms and fuel cut is at 7500rpms. Banging your engine off the rev-limiter is never a good idea. The stock fuel-cut is just that, when you hit the rev-limiter you have air and sprak with no gas....your pistons do not like that, trust me.

Vtec is simply a 12V source activated at a certain rpm. If you want to make sure Vtec is working, put a small bulb in line with the Vtec wire, if it lights at the desired rpm you know that power is being delivered to the solenoid which in turn applies oil pressure to the camshaft and thus engages Vtec.

 

Just like solorex was saying. The easiest way to check is to just go buy a 12v test light (or voltmeter if you have the loot) at an autoparts store. They run about $10. All you gotta do is unplug the plug from the vtec solenoid, and hook the light up to it, and clip the other wire to ground. Then, just rev the car and see if it lights.

---> basically if you have 12v at the wire, then your vtec is working. On a basically stock sohc vtec engine, you cant really -feel- it engage, it just get slightly louder. If your still using your old CRX ecu, then try setting the vtec engagement at 4800. My buddy has a SOHC Vtec with stock ecu and rpm switch, and it seems to run a little bit stronger this way. If i was you i would seriously consider an ecu to get the most out of your motor. If u have any q's then just shoot me an IM or post post post Good luck

 

Also, how are those KYBs doing? i kinda regret selling them now but oh well. least they're getting some use

 

Well the shocks are fine, except my brother sold his 91rex and now has an 88. So he is only using the front ones. I have some LCA from an 89 and I think I'm going to swap them out so he can use them. He just got some H&R Sport springs so I'm going to install them all this weekend. My brother wasn't even into the scene until I got him that 91 CRX. Now with his 88Si, he stays up or beats many of the guys around town. Now he's in love with the scene and can't get enough. He's getting a ZC in about another week and then I'm sure he's going to beat my car.

 

hey hows it going Sergio...hey if ur brother doesnt want the LCA from the '88...i might be interested in them...i might wanna slap down som cash for some Teins in the future...gonna need them LCAs if i do...
Ryan

 

Hey what's up man. I'm not sure if he's going to want to do that yet. He's thinking about just getting some adj koni's for the rear. But If we do I'll let you know.

 

I have a field vtec controller.