jorswift Posted September 29, 2011 Report Posted September 29, 2011 Well I have had the P15 '48 2dr Sedan for a summer now and love it. But I am looking to get a little more out of her. What can I do to increase the ponies a bit? I went to a huge car and rod show, but very limited on Plymouth parts. Thanks. Quote
55 Fargo Posted September 29, 2011 Report Posted September 29, 2011 Here was some advice given to me by a member of this forum, this and other ways to increase the HP for you... If your going to heat up the engine just shave the head about .50 thous. and add dual exhaust and adapter for a newer carb like Webber. I have done it all and believe me best bang for dollar is dual exhaust, shaved head and Webber carb. The breathing problem is in exhaust not intake. Quote
Don Coatney Posted September 29, 2011 Report Posted September 29, 2011 I believe this has been discussed on this forum many times. Did you use the forum search function to find answers? Did you go to the main webpage supporting this forum to look for answers? The first posting I made on this forum about 10 years ago I asked the same question. I was told by the forum owner to go to the main webpage to seek answers. Have you gone there and read everything? If not you should do so. Then use the search function and read everything you find. If you still have questions then ask away. Quote
Rusty O'Toole Posted September 29, 2011 Report Posted September 29, 2011 It depends how far you want to go and how much you want to spend. Basic hop up, low in cost and max bang for the buck: Shave head for more compression. Have a new exhaust made 1/2" larger than stock. Holley Weber carb on an adapter. Mild cam from Edgy. By the way, if your engine has more than 50,000 miles on it you will have to take it apart and rebuild or at least freshen it up first. Check crankshaft and bearings, pistons and rings, grind valves, generally overhaul or rebuild as necessary. If you hop up an old engine there is a good chance it will blow sky high in a month or two. The engine has to be in good shape before you start hopping it up or it will never last. On the other hand an "iffy" engine can go for thousands of miles if you leave it stock and baby it a little. There is a good chance if you overhaul the engine, or do a ring and valve job and get it running right, you won't need more power. The old flatheads will continue to run without complaint in an advanced state of wear. Do a compression test first and check your oil pressure. If it shows signs of weakness definitely overhaul or rebuild first. Quote
jorswift Posted September 30, 2011 Author Report Posted September 30, 2011 I read all sorts threads and topics. I will go back to the main page and read like stated. Thanks. Quote
jorswift Posted September 30, 2011 Author Report Posted September 30, 2011 The Phillips Performance website does not work or exsist any more. Quote
greg g Posted September 30, 2011 Report Posted September 30, 2011 phillips has been out of business for a long time. There is currently an aluminum intake that looks like a fenton clone on ebay for about 300 bucks. You can also search ebay for Thickstun, tattersfield, ellis, Mc Gurk, Offy, Offenhauser, edmunds, and edmonds (sic) for intakes. You can also visit member old daddy's site at www.rustyhope.com. And as metioned before consult the vendors list on the main page of site that support this forum. You might also visit the hamb website, and use thier search function for "Plymouth" you will find answers to questions you haven't thought of yet. But you should also ask yourself what "more performance" means to you, as building a full out race motor for street use is usually counter productive, and frustrating. As recommended first build a reliable, and safe car that runs like it was designed, then look for your pieces and procedures to modify it. Quote
Adam H P15 D30 Posted September 30, 2011 Report Posted September 30, 2011 Well I have had the P15 '48 2dr Sedan for a summer now and love it. But I am looking to get a little more out of her. What can I do to increase the ponies a bit? I went to a huge car and rod show, but very limited on Plymouth parts. Thanks. Put a HEMI in it....... Sorry had to say it Quote
Reg Evans Posted September 30, 2011 Report Posted September 30, 2011 Don't forget Porting and Polishing. Quote
Rusty O'Toole Posted September 30, 2011 Report Posted September 30, 2011 One thing that surprises me is that the last passenger car flatheads (57-59 230 cu in) were rated at 132 HP an advance of 40% in 10 years. Wonder how they did it. Quote
Adam H P15 D30 Posted September 30, 2011 Report Posted September 30, 2011 One thing that surprises me is that the last passenger car flatheads (57-59 230 cu in) were rated at 132 HP an advance of 40% in 10 years. Wonder how they did it. Higher compression Quote
jorswift Posted October 1, 2011 Author Report Posted October 1, 2011 Yeah, im not looking to build a race car. Just some to give me a little more power and keep up with traffic a little better. I also don't want to break the bank, but want something that looks cool. Maybe just help her breathe better and maybe a cam. Quote
claybill Posted October 1, 2011 Report Posted October 1, 2011 MY EXPERIENCE HAS BEEN...USING DUAL CARTERS.. GREAT POWER ON LOW AND MID-RANGE, EASY 3RD GEAr turns, MORE up hill power in gears. but maybe only 5-10 mph top speed gain. EXTRA manifold for sale.!! like new. bill Quote
LAKOTA169 Posted October 3, 2011 Report Posted October 3, 2011 MY EXPERIENCE HAS BEEN...USING DUAL CARTERS.. GREAT POWER ON LOW AND MID-RANGE, EASY 3RD GEAr turns, MORE up hill power in gears. but maybe only 5-10 mph top speed gain.EXTRA manifold for sale.!! like new. bill Any other changes besides the intake? Quote
claybill Posted October 4, 2011 Report Posted October 4, 2011 dual exhaust. i took original ex manifold AND CUT IT IN HALF. ETC.. BILL Quote
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.