Black & Red Posted October 29, 2014 Report Share Posted October 29, 2014 Guys, I'm looking to build up a 4.6 2V for my Mustang, just a little side garage project to play around with. My current motor is great at 211,000 and no oil use between 10,000 to 12,000 mile changes on Mobil 1, confirmed by oil analysis reports. I have always like the full floating pins on the Windsor and was thinking, since I will be swapping the engine out complete, why not just pick up a Windsor to base my rebuild on??? My question is, did the Windsor have a 'PI' version and what donor vehicles/years should I be searching for??? I am going to have Total Engine Airflow do the heads, but I want to start with a 'PI' casting. Thanks for your time and expertise... Link to comment Share on other sites More sharing options...
Det_Riot Posted October 29, 2014 Report Share Posted October 29, 2014 @iRoush @F8L GT @Luis@OrtizPerformance Link to comment Share on other sites More sharing options...
F8L GT Posted October 29, 2014 Report Share Posted October 29, 2014 Yes Windsor's came in pi. 99-01 gts were Windsor's, not sure when the trucks went pi Link to comment Share on other sites More sharing options...
Black & Red Posted October 29, 2014 Author Report Share Posted October 29, 2014 Thanks for the info!!!! Link to comment Share on other sites More sharing options...
Black & Red Posted October 31, 2014 Author Report Share Posted October 31, 2014 Question... What about a Windsor donor engine from a 99-2000 Lincoln or Crown Vic??? Or, is a Mustang my only option????????? Link to comment Share on other sites More sharing options...
F8L GT Posted November 1, 2014 Report Share Posted November 1, 2014 I'm pretty sure they were still npi those years Are you just doing a stock rebuild with ported heads Link to comment Share on other sites More sharing options...
Black & Red Posted November 4, 2014 Author Report Share Posted November 4, 2014 Ported heads, mild cams, otherwise stock... Link to comment Share on other sites More sharing options...
D3vst8r96gt Posted November 5, 2014 Report Share Posted November 5, 2014 F150s were Windsors pi after 99 Link to comment Share on other sites More sharing options...
Black & Red Posted November 6, 2014 Author Report Share Posted November 6, 2014 Ok, So what pistons would I want for my Windsor PI buildup to keep my compression around 9.50:1 (stock) basically....???? From what I read, all the 'PI' heads (Romeo & Windsor) all have the same size chambers. FYI I want to run floating pins in this motor... Thanks for your time!!!!! Link to comment Share on other sites More sharing options...
Black & Red Posted November 6, 2014 Author Report Share Posted November 6, 2014 Ok, So what pistons would I want for my Windsor PI buildup to keep my compression around 9.50:1 (stock) basically....???? From what I read, all the 'PI' heads (Romeo & Windsor) all have the same size chambers. FYI I want to run floating pins in this motor... Thanks for your time!!!!! Link to comment Share on other sites More sharing options...
Black & Red Posted November 6, 2014 Author Report Share Posted November 6, 2014 Sorry multi post... Link to comment Share on other sites More sharing options...
Blackmage Posted November 7, 2014 Report Share Posted November 7, 2014 Just basic stock 99-04 Pistons.... ?Sent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
Black & Red Posted November 7, 2014 Author Report Share Posted November 7, 2014 S stock Romeo and Windsor PI's both have 9.3:1 compression???? Link to comment Share on other sites More sharing options...
Blackmage Posted November 7, 2014 Report Share Posted November 7, 2014 I thought you wanted 9.5? Sent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
Black & Red Posted November 7, 2014 Author Report Share Posted November 7, 2014 I thought you wanted 9.5?Sent from my iPhone using Tapatalk Whatever stock is...I have seen documentation to show both 9.3 and 9.5:1 on the 4.6 V8. Maybe what's confusing me is the big bump in compression you get with 'PI' heads and 'Non-PI' pistons???? Link to comment Share on other sites More sharing options...
Blackmage Posted November 7, 2014 Report Share Posted November 7, 2014 PI motors are gonna have the same compression, regardless of windsor/romeo. heres the piston dish of the 2v's. SOHC 4.6L, 5.4L,and 6.8L1991 thru 1998 ----- 10.49cc dish1999 thru 2000 ----- 18.10cc dish2001 thru 2004 ----- 15.80cc dish here's some more useful info: COMPRESSION SPECSPISTON HEADS HEADSDISH CC NPI PI Flatop 10:3:1 11:2:12.66cc 10:0:1 10:9:14.54cc 9:8:1 10:7:110.49cc 8:9:1 9:5:115.80cc 8:5:1 9:0:118.10cc 8:3:1 8:8:1 Link to comment Share on other sites More sharing options...
Black & Red Posted November 11, 2014 Author Report Share Posted November 11, 2014 Awesome information. Thanks!!! Link to comment Share on other sites More sharing options...
