Us 89 405mi16 Questions

[Guest pugmi16vt]

Hello,

New to the forums and website.... nice to meet you all!! I have a 89 405MI16 and am finally getting around to working on it... had it stored for 6 years now and finally brought it home and putting it in the garage... will be a fall/winter project Now my first question is besides pulling it apart and having it port and pollished... what does everyone recommend for extra HP.... I will be pulling the engine out so now is the time. Since the car has what 147 hp stock I belive and I would like to hit close to 200hp naturally asperated. Can you give me a set of items that would get me close to that?? IE: some cams, tb...etc that may be of interest to me. I greatly appreciate your time and look forward to talking to all you Peugeot fans!!!! great to have a place like this.

 

p.s. I also need a new radiator... does anyone have a place that they reccomend for aftermarket ones? that have better cooling performance?

[Guest DesMi16]

200bhp is not too bad a target to aim for other than your emissions strangled, low comp US engines. The first thing that I would personally do is get the compression ratio up to around 11.3:1. I use the Catcams 283 10.8 lift cams on standard Mi bottom ends as the safe limit of 7400rpm can get the best of these cams. Vernier pulleys are a must to get spot on timing if you're going for the very best you can extract from it. We also run KMS 45 throttle bodies and management with a wide band lambda. Lambda keeps the emissions down and quite economical when cruising. A 2 1/2" exhaust will free up the top end. This spec will give 195-200bhp @7400rpm.

 

As for radiators, there's loads of places in the UK that sell aluminium rads but that's probably not a lot of help in the US.

[petert1345402284 0]

How you get the CR to up near, or above 11:1, is your biggest issue, as you only have 9.7:1 to begin with. There are basically three methods, depending on the condition of your existing liners:

 

1. Fit new XU9J4 pistons/liners - still only gives 10.4:1

 

2. Deck existing block and liners 1.3mm - gives 10.8:1

 

3. Bore existing liners to suit new forged 83.50mm pistons.

 

Point #1 is the least desireable as you only end up with 10.4:1 and a less than desireable squish height, if you can find some. I have done both 2 and 3. Decking gives a very impressive result from the std. pistons as the squish height is reduced. I can give you the part # for the Wiseco forged pistons I designed if you want to go the forged route. They give 11.25:1. As you're in the US, they'll ship direct to you. They're approx. US$480 for the set.

 

If going for that much hp, you'll need a bigger inlet cam, so you'll need to check piston/valve clearances with both 2 and 3. I sell an exchange reground Stage II inlet cam that will make 200hp with either 2 or 3, and 45mm TB's.

 

You will also need to find a reputable machine shop that can bore/hone liners without ending up with an oval bore.