Engine modification help.

[kbmb02]

6 hours ago, Vicleonardo1 said:

Question for the guru's.

If he is looking for a little more grunt at the lower end and midrange, and keeping most everything else stock, wouldn't a 284 cam be a good option? 

 

I use a custom 284 in many of my M10 engine builds, folks seem to like it. -KB

[Maarten_van_Dijk]

So since we're on the topic... I have an e21 head that came with a schrick 292 and a Stahl header. I want to put put them on the o2 but had a couple questions. First, is there any added gains from the e21 head? I bought new HD valve springs, chromoly retianers and rocker locks. I will never track the car and don't anticipate redlining it very often if at all so planned to reuse stock rocker arms as long as the show no defects. Whether I keep the cam in the e21 head or use my current 2002 head I will have have a trusted machine shop service the head and install the new parts. I plan to port match the intake & exhaust ports.
Second question, the header I have seems a little under sized, possibly even restricting. The 4 tubes that come off the head are 1.25" od and the main tube is 1.75" od. Is that to small to be an upgrade?
BTW, I already have the 38/38 and plan to do petronix.
Thanks in advance

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Second question about the header. Upgrade of the header is needed with >200 HP. My experience is this header gives more driver flexibility and 3-5 HP more per rpm.

Succes

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[Vicleonardo1]

8 hours ago, kbmb02 said:

 

I use a custom 284 in many of my M10 engine builds, folks seem to like it. -KB

I think that's what he may be looking for. From his initial question and answers, It seems like he is looking for more power from the lower end, and not necessarily getting most of his HP at higher revs. (where most of us that daily drive our cars don't live..unless you are "Tuuurbo" Toby) 

 

According to Toby,  the a 32/36 has plenty of airflow at WOT. The stock headers and most likely the stock exhaust will do ok. From what I have read on this forum,  the 292 will provide better HP at mid to higher revs without being lopey at idle. 

 

Ken, is this the 284 "T" (I assume T is for taller) cam I have seen some reference to?