I'm just wondering what is the NA tuning potential for the H23 as in the amount of parts, etc. I already have experience with an Turbo H22 and I wanna try a different platform. Also there are more 4th gen Si's than VTEC's and I can get a good deal on them. I believe that this car can be a killer sleeper if you give it some attention. I will either get the Prelude Si or the Integra GS-R. What do you guys think b/c I need something to replace my stolen Lude *sigh*


[Modified by TurboLude22, 5:06 PM 11/30/2001]

 

round of drinks on me....sorry your lude was stolen man

 

I think with some mild cams the H23 powered Prelude will beat a GSR, especially once they're both turbo'd.

I think the H23 could be asked to produce a good 170hp to the wheels with some moderate attention, and 4G Si's are lighter than their VTEC counterparts. The H23 also has one great thing, torque.

Add a turbo on the mix and the fact that the H23 doesn't have VTEC means alot less. A mild street cam + T3/T04E turbo = killer power.

I think this would be a very interesting and low budget setup.

 

with a prelude si, with intake and exhaust you should be able to take both the GRS and civic si with intake and exhaust, torque and a good lauch,
i have done it many times

 

This is what I'm thinking. If I go ahead with the project I'll be looking for @170-180 N/A horsepower with some torque to match. What do the 4th gen Si run in the 1/4 stock and how does it match with a Integra GSR assuming both cars are stock? This would make an interesting setup. I need more input especially from 4gen Si owners on this forum.

 

A stock 4th gen Si will usually run 15.5-16.0 ballpark if it's stock and depending on the driver of course. Don't know how many modded cars you will be able to beat if you go N/A though. The Prelude is a heavy beast. I suggest either F/I or slap the H23 in a crx and go high compression. Now, that's a sleeper.

 

The h23 has great potential even n/a.Cams and some head work with bolt ons should bring low 14's.It doesnt rev as high as some of the other honda engines but you dont need to with the extra torque.

 

The fastest NA 4th gen Si I know of ran 14.5 with a short ram intake, DC header, custom exhaust, AEM (yes, AEM) cams, chip w/ raised limiter, TB, fpr, and cam gears. My old Si ran 15.1@91 w/ Iceman, 2.25 exhaust, Pacesetter header, and AEM cam gears. I think that with a better header and better tires I could've hit 14's. Also, at the time of the 15.1 run, the car was burning LOTS of oil, so I'm certain that the rings were bad, and compression was down. Prelude Si's do have lots of potential. They don't have more torque than the VTECs, but the torque comes curve is flatter and reaches max torque sooner. My Si would put you back in the seat WAY harder than any other Honda I've been in. Mine felt like it would keep making power way past the rev limiter.

 

What is the redline on the Si anyway?

 

redline is 6500. Gude makes some very nice head packages for the H23. h23 is closed deck. slightly lower compression ratio then H22. i have never lost to a gs-r. if u have any more questions just let me know

 

I agree with 94preludeSi.The Gude head package did wonders for my car.It ran 15.2 stock with only an aem cai.With the head package and bolt ons it went 14.2 on street tires and 13.9 on slicks N/A.It pulls like a v8 but gives out about 7500 rpm.I now have a full jg pro series block and some other goodies looking for low to mid 13's N/A.

 

Damn! 14.2 on street tire for an NA Si. Impressive. Was the interior stripped? What was the trap speed? Thanks


[Modified by credditt, 5:12 PM 12/3/2001]

 

Wow that is impressive what's your setup I'm just wondering?

 

H23's can also take nitrous oxide pretty well too. With an intake, and 2.5" exhaust and running 75 jets, I've netted 14.1's on street tires. This is with stock clutch also. I'm pretty sure with more tuning and stickier tires, I can dip into the 13's.

Too bad I'm going H22 next Spring.

 

At the time of the 14.2 the car had a Gude head package,Tanabe ex.,aem cai,dc header,unorth underdrives,aem cam gears,venom injectors&fuel pump,and stock clutch.The pass seat was out and trunk was empty(no spare or stereo).I was very shocked at the times.i will need to find the time slip to get speed but i think around 96 mph.This was in Feb.so the weather in montgomery alabama was cool.The next week i tried a set of et drags and got a 13.9 for 1 pass but with all stock suspension and clutch i did not try it again.Unfortunately a while later i spun a bearing and totally screwed my crank and line bore in my block so the new setup began.I now added a H22a block bored and slightely stroked(some new rod lengthening thing JG does)high comp arais pistons,saanz rods,full JG pro series block,stage 4 CM clutch&flywheel,Vitek axels,Tanabe Sustec ProSS coilovers,and a whole list of other goodies hoping for low 13's.I need dyno time but due to a recent relocation by my company i have not had time.Sorry for the length of this i am answering two posts.Feel free to ask me any questions i am by far not an expert but have learned a lot building this car.

 

prelude all the way over gsr. h23 definetly, cheaper, easier to find, just as easy to build on. I have a 95 Prelude SE, wich is an Si with a vtec package(everything except the engine), I dropped the spare tire and a few other things and got rid of 70 lbs, and STOCK ran a 1/4 15.3 go for the h23, it's a good engine. of course I came across a good deal and now have dropped the jap spec vtec into mine and have 200hp "stock", lol. thinking about going all motor and sending it to jun?